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提问人：网友seasonguan
发布时间：2022-01-07
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When pine cones fall off the tree, they open up to allow the seeds to be released.
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更多“When pine cones fall off the tree, they open up to allow the seeds to be released.”相关的问题
第2题
The sea lay like an unbroken mirror all around the pine - girt, lonely shores of Orr's Isl
and. Tall, kingly spruces wore their regal crowns of cones high in air, sparkling with diamonds of clear exuded gum; vast old hemlocks of primeval growth stood darkling in their forest shadows, their branches hung with long hoary moss; while feathery larches, turned to brilliant gold by autumn frosts, lighted up the darker shadows of the evergreens. It was one of those hazy, calm, dissolving days of Indian summer, when everything is so quiet that the faintest kiss of the wave on the beach can be heard, and white clouds seem to faint into the blue of the sky, and soft swathing bands of violet vapor make all earth look dreamy, and give to the sharp, clear-cut outlines of the northern landscape all those mysteries of light and shade which impart such tenderness to Italian scenery.
点击查看答案
The funeral was over, --the tread of many feet, bearing the heavy burden of two broken lives, had been to the lonely graveyard, and had come back again, -- each footstep lighter and more unconstrained as each one went his way from the great old tragedy of Death to the common cheerful of Life.
The solemn black clock stood swaying with its eternal “tick - tock, tick -tock,” in the kitchen of the brown house on Orr's Island. There was there that sense of a stillness that can be felt, -- such as settles down on a dwelling when any of its inmates have passed through its doors for the last time, to go whence they shall not return. The best room was shut up and darkened, with only so much light as could fall through a little heart-- shaped hole in the window - shutter, -- for except on solemn visits, or prayer- meetings or weddings, or funerals, that room formed no part of the daily family scenery.
The kitchen was clean and ample, with a great open fireplace and wide stone hearth, and oven on one side, and rows of old - fashioned splint - bottomed chairs against the wall. A table scoured to snowy whiteness, and a little work - stand whereon lay the Bible, the Mixssionary Herald, and the Weekly Christian Mirror, before named, formed the principal furniture. One feature, however, must not be forgotten, -- a great sea - chest, which had been the companion of Zephaniah through all the countries of the earth. Old, and battered, and unsightly it looked, yet report said that there was good store within of that which men for the most part respect more than anything else; and, indeed, it proved often when a deed of grace was to be done -- when a woman was suddenly made a widow in a coast gale, or a fishing - smack was run down in the fogs off the banks, leaving in some neighboring cottage a family of orphans, -- in all such cases, the opening of this sea - chest was an event of good omen to the bereaved; for Zephaniah had a large heart and a large hand, and was apt to take it out full of silver dollars when once it went in. So the ark of the covenant could not have been looked on with more reverence than the neighbors usually showed to Captain Pennel's sea - chest.
The author describes Orr's Island in a(n) _______ manner.
A．emotionally appealing, imaginative
B．rational, logically precise
C．factually detailed, objective
D．vague, uncertain
第3题
Why roses are red and violets are blue？ Did you ever wonder why you see the colors you do
Why roses are red and violets are blue？
Did you ever wonder why you see the colors you do or if other animals see the same colors that you see？ We see light that bounces off of things around us. When the light enters our eyes, special cells tell our brains about the light. These cells are called photoreceptors. Light is made of little bits called photons. When the sun shines, trillions and trillions of these little bits of light fall on the earth. The photons bounce off of almost everything and some of them enter our eyes. Those bits that enter our eyes allow us to see. So, where does the color come from？
Starting in the 1600s with Sir Isaac Newton, scientists have believed that there are different kinds of photons. Different types give rise to our sense of colors. The different photons are said to have different wavelengths. Sunlight contains all the different wavelengths of photons. The visible wavelength colors can be seen when you look at a rainbow. Raindrops acting as natural prisms produce the colors.
HOW do our photoreceptors work？
We have two main types of photoreceptors called rods and cones. They are called rods and cones because of their shapes. These cells are located in a layer at the back of the eye called the retina. Rods are used to see in very dim light and only show the world to us in black and white. This is why you see only black and white when you are outside in the evening or in a dimly lit room. The other type of photoreceptors, the cones, allow us to see colors. They are not as sensitive as the rods so they only work in bright light. There are three types of cones, one for each of the three main colors we see, red, green and blue.
Some people have a genetic defect that makes one or more of the cones fail. This condition is known as color deficiency. You may have heard it called color blindness. Color blindness is fairly common, affecting about nine percent of all humans.' It is much more common in men than in women. To test for color blindness a special picture called an Ishihara test is used.
What about other animals？ What kind of colors do they see？ Most animals see fewer colors than we do, but some see more! We know this by looking at how many kinds of cone
photoreceptors they have. Another good indication of what an animal can see is by looking at their own colors. The colors of their prey are also an indication of an animals ability to see color.
What three primary colors do we see？
A．Red, white, and blue.
B．Red, green, and yellow.
C．Red, green, violet.
D．Red, green, blue.
第4题
【判断题】When making projections of points in the conical surfaces of cones and spherical surfaces on spheres, auxiliary element method and auxiliary latitude circle method can both be used.
第5题
Rather than be burned to death in his blazing shell-torn Lancaster on a bombing raid o
ver Germany in 1944, Royal Air Force Gunnery Sergeant Nicholas Alkemade jumped from 18, 000 feet without a parachute (降落伞), calculating that this would be a quicker and less painful death.Unbelievably, he suffered only slight injuries. The last part of his 122-mile-per-hour fall was broken by the branches of young pine trees, thick springy undergrowth, and finally deep snow. "It was rather like bouncing on a trampoline, " he recalled.Sergeant Alkemade's experience is a dramatic rebuttal of the idea that people falling from great heights are dead before they hit the ground. Asphyxia, brought about by the speed of the fall, and heart failure through shock were thought to occur long before the final impact.The fallacy of this belief has been amply (充分地) demonstrated by free-fall parachutists who regularly drop several miles before opening their parachutes. In 1960 Capt. Joseph Kittinger jumped from a balloon in the United States and fell 16 miles before opening his parachute. He landed conscious and unhurt.
点击查看答案
1.According to the passage, Nicholas Alkemade ____.
A、was a German officer during the Second World War
B、had often jumped from a height of about 18, 000 feet
C、was a British officer
D、calculated the height with a special instrument
2.Nicholas jumped out of his plane because ____.
A、he was a good parachutist
B、he would otherwise be burned to death
C、he wanted to become a hero
D、the Royal Air Force instructed him to do so
3.Nicholas's experience was ____.
A、only an experiment
B、just as he had expected it to be
C、something painful and quick
D、quite unimaginable
4.Which of the following in the passage was the name of Nicholas's plane？ ____
A、Lancaster
B、Gunnery
C、Trampoline
D、Asphyxia
5.The passage tells us that Capt. Joseph Kittinger ____.
A、served as a pilot during the Second World War
B、did not believe that people would die if they jumped from a plane without parachutes
C、made a successful free-fall land from a balloon
D、often forgot to open his parachute when jumping from a plane
第6题
The story reaches its climax when ______.A.Sylvia accompanies the man on a ramble throug
A.Sylvia accompanies the man on a ramble through the woods
B.the man describes the bird and Sylvia recognizes it
C.the man offers Sylvia 10 dollars for the bird
D.Sylvia climbs a huge pine tree and finds the white heron nest
第7题
The sea lay like an unbroken mirror all around the pine-girt, lonely shores of Orr's Islan
d. Tall, kingly spruces wore their regal crowns of cones high in air, sparkling with diamonds of clear exuded gum; vast old hemlocks of primeval growth stood in their forest shadows, their branches hung with long hoary moss; while feathery larches, turned to brilliant gold by autumn frosts, lighted up the darker shadows of the evergreens. It was one of those hazy, calm, dissolving days of Indian summer, when everything is so quiet that the faintest kiss of the wave on the beach can be heard, and white clouds seem to faint into the blue of the sky, and soft swathing bands of violet vapour make all earth look dreamy, and give to the sharp, clear-cut outlines of the northern landscape all those mysteries of light and shade which impart such tenderness to Italian scenery.
点击查看答案
The funeral was over, -- the tread of many feet, bearing the heavy burden of two broken lives, had been to the lonely graveyard, and had come back again, -- each footstep lighter and more unconstrained as each one went his way from the great old tragedy of Death to the common cheerful of Life.
The solemn black clock stood swaying with its eternal "tick-tock, tick-tock," in the kitchen of the brown house on Orr's Island. There was there that sense of a stillness that can be felt, -- such as settles down on a dwelling when any of its inmates have passed through its doors for the last time, to go whence they shall not return. The best room was shut up and darkened, with only so much light as could fall through a little heart- shaped hole in the window-shutter, -- for except on solemn visits, or prayer-meetings or weddings, or funerals, that room formed no part of the daily family scenery.
The kitchen was clean and ample, with a great open fireplace and wide stone hearth, and oven on one side, and rows of old-fashioned splint-bottomed chairs against the wall. A table scoured to snowy whiteness, and a little work-stand whereon lay the Bible, the Missionary Herald, and the weekly Christian Mirror, before named, formed the principal furniture. One feature, however, must not be forgotten, -- a great sea- chest, which had been the companion of Zephaniah through all the countries of the earth. Old, and battered, and unsightly it looked, yet report said that there was good store within of that which men for the most part respect more than anything else; and, indeed, it proved often when a deed of grace was to be done when a woman was suddenly made a widow in a coast gale, or a fishing-smack was run down in the fogs off the banks, leaving in some neighboring cottage a family of orphans, -- in all such cases, the opening of this sea-chest was an event of good omen to the bereaved; for Zephaniah had a large heart and a large hand, and was apt to take it out full of silver dollars when once it went in. So the ark of the covenant could not have been looked on with more reverence than the neighbours usually showed to Captain Pennel's sea-chest.
The author describes Orr's Island in a(n) _______ manner.
A．emotionally appealing, imaginative
B．rational, logically precise
C．factually detailed, objective
D．vague, uncertain
第8题
The answer, in one word, is aggression. Chipmunk species actively defend their ecological
zones from encroachment by neighboring species. The yellow pine chipmunk is more aggressive than the sagebrush chipmunk, possibly because it is a bit larger. It successfully bullies its smaller evolutionary cousin, excluding it from the pine forests. Experiments have shown that the sagebrush chipmunk is physiologically able to live anywhere in the Sierra Nevada, from high alpine zones to the desert. The little creature is apparently restricted to the desert not because it is specialized to live only there but because that is the only habitat where none of the other chipmunk species can live. The fact that sagebrush chipmunks tolerate very warm temperatures makes them, and only them, able to live where they do. The sagebrush chipmunk essentially occupies its habitat by default. In one study, ecologists established that yellow pine chipmunks actively exclude sagebrush chipmunks from pine forests; the ecologists simply trapped all the yellow pine chipmunks in a section of forest and moved them out. Sagebrush chipmunks immediately moved in, but yellow pine chipmunks did not enter sagebrush desert when sagebrush chipmunks were removed.
点击查看答案
The word "encroachment" in the passage is closest in meaning to
A．complete destruction
B．gradual invasion
C．excessive development
D．substitution
第9题
The holiday season is a time for celebrating with friends and family. It is often called the giving season because during the holidays people give gifts and they also have celebrations and decorate （装饰） their homes. Unfortunately, this can all lead to a lot of waste. And some parts of the holidays create a lot of waste- for example, holiday cards, decorations, the tree, enter taining, and gift wrap. However, there are ways to reduce the amount of waste you create. Experts recently gave some ideas to the Associated Press. One of those experts （专家） is Liz Vaccariello. Vaccariello says this year is a great year to think about using products that can be recycled when celebrating the holidays. She said, “It is a great way to feel good as you enter the giving season. Another expert is Melissa 0zawa. She is an editor at Martha Stewart Living and suggests thinking carefully about what you buy. 0zawa says that now more than ever we should be asking ourselves: Do I really want this? Will I use it? And how will it affect the planet? The concerns about paper waste have caused many people to look at other choices for wrapping a present. You can use reusable bags for gifts. Vaccariello suggests keeping gift bags and other decorations that you receive. You can reuse them the next time you give a gift. You can buy from companies that make environmentally- friendly gift wrap. Some companies make recyclable wrapping paper and do not use materials that are not recyclable. You can also wrap gifts in old maps, pages from magazines, and art paper. The person receiving the gift could use the wrapping for something else. Ozawa says she likes the Japanese tradition of furoshiki. This is where gifts are wrapped in cloth. The pretty and strong wrapping cloths can be used for other things, instead of just being thrown away. You could also wrap a gift in a colorful scarf or tablecloth. This makes the wr apping cloth part of the gift itself. Instead of decorating a gift with something plastic, you can use something natural such as pine cones, rosemary, or other evergreen.
（1）The holiday season is called the“giving season”mainly because（）.
A、people have celebrations
B、people create lots of wastes
C、people buy presents for their beloved ones
D、people decorate their houses
（2）According to the passage,Liz Vaccariello supports（）.
A、g0 foline vken eterine the eivine ce
B、recycled gifts
C、products that can be used repeatedly
D、plastic decorations
（3）In the holiday season, ways to avoid creating waste don' t include（）.
A、keeping gift bags and other decorations that you receive
B、quitting the tradition of giving gifts to family and friends
C、using products that can be recycled
D、apping gifts in old maps, pages from magazines, and art paper
（4）In the Japanese tradition of furoshiki, when giving a gift, people（）.
A、vwrap it in pretty and strong cloth
B、cover it writh old magazines, maps or art paper
C、decorate it with natural things
D、choose economically friendly gift vwrap
（5）It can be inferred from the passage that（）.
A、people are getting poorer this year so they have to think of saving money
B、more and more people are willing to protect the planet by reducing waste
C、people find the holiday seasons annoying
D、environment- friendly products are more expensive
第10题
The audience at the pop concert s__________ for shelter when the rain began to fall heavily.
