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提问人：网友liyanfeiyl 发布时间：2022-01-07

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According to the passage, stem cells refer to ______.A．cells that can become brain cells,

According to the passage, stem cells refer to ______.

A．cells that can become brain cells, blood cells or many other kinds of cell.

B．cells that can become what they want to be pretty much any other type of cell.

C．cells that are uncertain to become blood cells or brain cells when they grow up.

D．cells that have not decided when they grow up.

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更多“According to the passage, stem cells refer to ______.A．cells that can become brain cells,”相关的问题

第1题

10. Computed tare is a tare previously agreed upon by the seller and the buyer.

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第2题

One should acquire necessary surviving skills before taking an adventure travel.

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第3题

阅读理解。????Environmentalists said our planet was...

阅读理解。

Environmentalists said our planet was doomed to die. Now one man says they are wrong.

"Everyone knows the planet is in bad shape," thundered a magazine article last year. Species are being

driven to die out at record rates, and the rivers are so poisonous that fish are floating on the surface, dead.

But there's a growing belief that what everyone takes for granted is wrong: things are actually getting

better. A new book is about to overturn our most basic assumptions about the world's environment. Rivers, seas, rain and the atmosphere are all getting cleaner. The total amount of forests in the world is not

declining. The Skeptical Environmentalist by Bjorn Lomborg, professor of statistics at the University of

Aarhus in Denmark, is an attack on the misleading claims of environmental groups, and the "bad news"

culture that makes people believe everything is getting worse.

Now the attacks are increasingly coming from left-wing environmentalists such as Lomborg, a former

member of Greenpeace. The accusation is that, although the environment is improving, green groups-with

profits of hundreds of mil-lions of pounds a year - are using scare tactics(谋略)to gain donations. Lomborg's book doesn't deny global warming - probably the biggest environmental threat - but destroys almost

every other environmental claim with many official statistics.

The Worldwatch Institute claims that "deforestation(沙漠化) has been accelerating over the last 30

years". But Lomborg says that is simply rubbish. Since the dawn of agriculture the world has lost about

20 per cent of its forest cover, but in recent decades the forest area'sdepletinghas come to a stop.

According to UN figures, the area of forests has remained almost steady, at about 30 per cent of total

land area, since the 1940s. Forests in countries such as the US, the UK and Canada have actually been

expanding over the past 40 years. Despite all the warnings the Amazon rainforest has only shrunk by

about 15 per cent.

Nor are all our species dying out. Some campaigners claim that 50 per cent of all species will have

died out within 50 years. But other studies show only 0.08 per cent of species are dying out each year.

Conservation efforts have been successful. Whales are no longer threatened and the bald eagle is off the

endangered list.

Environmental groups claim that many of the improvements are the results of the success of their

campaigns. Stephen Tindale, director of Greenpeace UK, said, "There are important examples, such as

acid rain and ozone, where things aren't as bad as predicted, and that's because behavior has changed."

1. In his book,The Skeptical Environmentalist, what is Lomborg's main argument？

A. Our planet is in bad shape.

B. The world's environment is improving.

C. The total amount of forests in the world is not declining.

D. Conservation efforts have been successful.

2. What is Lomborg's main accusation of environmentalists？

A. They scared people into making donations.

B. They overturned our basic assumptions about the world's environment.

C. They changed their behavior toward the environment.

D. They only told people bad news about the environment.

3. The underlined word "depleting" in Paragraph 5 is closest in meaning to "____".

A. reducing

B. limiting

C. expanding

D. accelerating

4. According to the passage, which of the following statements is true？

A. The total area of forests in the world has increased significantly.

B. The effects of global warming are not as bad as first expected.

C. It appears that the bald eagle will now survive.

D. In the last 50 years the number of whales has increased.

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第4题

A hat stand is something that you can put your hat and clothes on.

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第5题

College is a place to explore many possibilities; you really can’t do it all-unless you manage your time wisely.Here are some tips I have found very helpful for managing my time and maximizing(使 … 最大化)my study efforts ：

1.Determine your goals.What do you want to get out of a college education? Academic(学术的)knowledge? Leadership experience within a club? Decide what is most important to you.Then de vote proportionate(成比例的)amounts of time to those efforts.

2.Plan ahead.You may think you can keep everything in your head, but as the activities on your schedule start piling up, making a schedule can really help organize even little tasks.

3.Study at strategic (关键的)times.Don’t wait until you’re falling asleep to study.Study first.Save those e-mails to check later, because tasks that don’t require much energy and attention can still be done when you’re tired.

4.Motivate (激励)yourself! You know t hat TV show you’ve been dying to see, or that game of chess you’ve been waiting all week to challenge your friend to.These and many other special activities can be used for motivation.Promise yourself that you’ll force yourself to work efficiently.(Don't rush through the assignment, though.)

5.Take a nap.Sometimes even a 20-minute nap in the afternoon will give you the extra energy you need to get through the day.

1.We need to play ahead in order to ().

A.keep a record of all the events

B.better organize our activities

C.store everything in our head

D.pile up little tasks neatly

2.Strategic times are best for us to ().

A.save energy

B.check e-mails

C.study efficiently

D.orga nize activities

3.Which of the following could be used as a motivation to do our assignments?()

A.Remembering our urgent tasks

B.Any activities we’re eager to do

C.Taking a break in the afternoon

D.The promise to study efficiently

4.What can help us to keep refreshed throughout the day?()

A.Doing some physical exercise

B.Taking a short nap in the afternoon

C.Rushing through some assignments

D.Playing a game of chess with a friend

5.Which of the following could be the best title for this article?()

A.Study Habits and Time Management

B.Business Management and Leadership

C.University Education and Campus Life

D.Life Goals and Academic Development

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第6题

The most important reason why the cost of e-commerce is lower is that e-commerce eliminates the ______________. The e-store has a direct relationship with its customers.

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第7题

Watch the video titled: Are China and the US doomed to conflict? http://www.bilibili.com/video/BV13s411D7C6?from=search&seid=13376876467636848555 Write down your opinion on this topic. You are supposed to write in no less than 100 words.

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