Fruit Imagine a world without fruit. We wouldn’t be very healthy. We get a lot of important vitamins from eating fruit. We think of fruit primarily as something to eat._____(26)Fruit is part of a flowering plant and it carries the seeds. The purpose of fruit is to protect a plant's seeds and help them get spread about. Wind and water spread seeds. So do animals when they eat fruit and drop the seeds. _____(27) There are two main types of fruit: fleshy and dry. Fleshy fruits are soft and juicy. Pears, bananas and apples are all fleshy fruits. _____(28)Grains like wheat and rice, or nuts like chestnuts(板栗), are dry fruits. But wait: You've eaten oranges and grapes without seeds. How can they be fruits? It's because people have changed the way they grow fruit. They can now grow seedless fruit. Seedless fruit comes from special plants that are made by combining two varieties of a fruit to form a new variety. These special plants grow and produce seeds. _____(29)These plants cannot reproduce themselves. They can make fruit, but the fruit has no seeds. Fruits are a source of substances that keep us alive and healthy. So people make use of fruits for many foods. We make juices from them. We make jams and sweets. _____(30)Beer comes from grains and wine comes from grapes, and some particular wines are made from apples, peaches, or other fruits. _____.A.Dry fruits are thin and hard.
B.We even make alcohol from fruit.
C.But fruit has a purpose quite apart from our needs.
D.So these plants produce fleshy fruits.
E.Then the seeds grow into new plants.
F.But the plants grown from these seeds are seedless.
_____.A.Dry fruits are thin and hard.
B.We even make alcohol from fruit.
C.But fruit has a purpose quite apart from our needs.
D.So these plants produce fleshy fruits.
E.Then the seeds grow into new plants.
F.But the plants grown from these seeds are seedless.
_____.A.Dry fruits are thin and hard.
B.We even make alcohol from fruit.
C.But fruit has a purpose quite apart from our needs.
D.So these plants produce fleshy fruits.
E.Then the seeds grow into new plants.
F.But the plants grown from these seeds are seedless.
_____.A.Dry fruits are thin and hard.
B.We even make alcohol from fruit.
C.But fruit has a purpose quite apart from our needs.
D.So these plants produce fleshy fruits.
E.Then the seeds grow into new plants.
F.But the plants grown from these seeds are seedless.
_____.A.Dry fruits are thin and hard.
B.We even make alcohol from fruit.
C.But fruit has a purpose quite apart from our needs.
D.So these plants produce fleshy fruits.
E.Then the seeds grow into new plants.
F.But the plants grown from these seeds are seedless.
Questions are based on the following passage: In the late 1960’s, many people in North America turned their attention to environmental problems, and new steel-and-glass skyscrapers were widely criticized. Ecologists pointed out that a cluster of tall buildings in a city often overburdens public transportation and parking lot capacities. Skyscrapers are also lavish (浪费的) consumers, and wasters, of electric power. In one recent year, the addition of 17 million square feet of skyscraper office space in New York City raised the peak daily demand for electricity by 120,000 kilowatts— enough to supply the entire city of Albany, New York, for a day. Glass-walled skyscrapers can be especially wasteful. The heat loss or gain through a wall of half-inch plate glass is more than ten times that through a typical masonry (砖石) wall filled with insulation board. To lessen the strain on heating and air-conditioning equipment, builders of skyscrapers have begun to use double-glazed panels of glass, and reflective glasses coated with silver or gold mirror films that reduce glare as well as heat gain. However, mirror-walled skyscrapers raise the temperature of the surrounding air and affect neighboring buildings. Skyscrapers put a severe strain on a city’s sanitation facilities, too. Skyscrapers also interfere with television reception, block bird flyways, and obstruct air traffic. In Boston in the late 1960’s, some people even feared that shadows from skyscrapers would kill the grass on Boston Common. Still, people continue to build skyscrapers for all the reasons that they have always built them—personal ambition, civic pride, and the desire of owners to have the largest possible amount of rentable space. Q: What’s the main purpose of the passage?
A、To discuss the effect of skyscrapers on the environment.
B、To compare skyscrapers with other modern structures.
C、To support the use of masonry in the construction of skyscrapers.
D、To illustrate some architectural designs of skyscrapers.
A、deprives
B、engages
C、derives
D、requires
A、nuclear tower
B、reactors
C、nuclear fusion
D、nuclear fission
California has been facing a drought for many years now, with certain areas even having to pump freshwater hundreds of miles to their distribution system. The problem is growing as the population of the state continues to expand. New research has found deep water reserves under the state which could help solve their drought crisis. Previous drilling of wells could only reach depths of 1,000 feet, but due to new pumping practices, water deeper than this can now be extracted (抽取). The team at Stanford investigated the aquifers(地下蓄水层)below this depth and found that reserves may be triple what was previously thought. It is profitable to drill to depths more than 1,000 feet for oil and gas extraction, but only recently in California has it become profitable to pump water from this depth. The aquifers range from 1,000 to3,000 feet below the ground, which means that pumping will be expensive and there are other concerns. The biggest concern of pumping out water from this deep is the gradual setting down of the land surface. As the water is pumped out, the vacant space left is compacted by the weight of the earth above. Even though pumping from these depths is expensive, it is still cheaper than desalinating(脱盐)the ocean water in the largely coastal state. Some desalination plants exist where feasible, but they are costly to run and can need constant repairs. Wells are much more reliable sources of freshwater, and California is hoping that these deep wells may be the answer to their severe water shortage. One problem with these sources is that the deep water also has a higher level of salt than shallower aquifers. This means that some wells may even need to undergo desalination after extraction, thus increasing the cost. Research from the exhaustive study of groundwater from over 950 drilling logs has just been published. New estimates of the water reserves now go up to 2,700 billion cubic meters of freshwater. 1 How could California's drought crisis be solved according to some researchers?
A、By building more reserves of groundwater.
B、By drawing water from the depths of the earth.
C、By developing more advanced drilling devices.
D、By upgrading its water distribution system.
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