Researchers hold that boredom results from______.A．natural surroundingsB．various kinds of

Dr. Myers and other researchers hold that ________.

[A] people should look for a baseline that can’t work for a longer time

[B] fisheries should keep the yield below 50% of the biomass

[C] the ocean biomass should restored its original level

[D] people should adjust the fishing baseline to changing situation

Dr Myers and other researchers hold that

A. people should look for a baseline that can’t work for a longer time. B. fisheries should keep the yield below 50% of the biomass C. the ocean biomass should restored its original level. D. people should adjust the fishing baseline to changing situation

根据下面短文内容，回答题。

Spoilt for Choice

Some research which was recently carried out in Britain has confirmed what many ordinary shoppers have suspected for quite a long time. Having a__________(51) election of goods to choose from is not necessarily a__________(52) to consumers. The average supermarket in Britain has around 40,000 different products on sale at any one time and if you&39;re__________(53) of buying a car, then there are actually around 1,600 different__________(54) on the market.

In one sense, choice is a good thing because it __________ (55) us to buy those products which best suit our needs. But choice can also __________ (56) something of a problem. With over 400 brands of shampoo on the market, how does the consumer__________ (57) hold of the information necessary to choose between them？

For some people, the solution is to buy only well-known brands, whilst others are happy to be__________(58) by advertising. There is evidence,__________(59), that for some people the__________ (60) of choice available to them in Britain&39;s consumer society is actually a __________ (61)of anxiety and stress. One man interviewed by the researchers admitted that he had__________(62) out to buy his girlfriend a mobile phone for her birthday, but was so__________(63) by the number of different types on offer in the shop that he __________ (64) up and decided to buy her a bundle(束 )

of flowers__________(65)!

__________ 查看材料

A.deep

B.wide

C.long

D.tall

Gliese 581g is the sixth planet to be found circling a dwarf star some 20 light-years away, in the constellation of Libra. On paperit looks good – three times the mass of the Earth with possibly a rocky surface and enough gravity to hold on to an atmosphere.

The researchers also promised shirt-sleeve weatherin some regions, but not everywhere. One side of the planet is almost always in sunshine; the other almost always in darkness and estimated temperatures range from minus four degrees Celsius to a very hot 71 degrees. A year meanwhile would go by in just 37 days.

Of course, whether life could really be supported on Gliese 581g will need much more investigation and, most probably, technologies which don't exist yet. But the astronomers say planet hunting is getting easier and they were surprised how quickly they detected the tell-tale signsof this distant body, using ground-based telescopes.

21. Which of the following is correct about Gliese 581g？_____

A. It is a dwarf star with gravity.

B. It is a planet like the earth.

C. It was discovered many centuries ago.

D. It is very close to the earth.

22. What does Gliese 581g look like？_________

A. It has the mass of the sun.

B. It has about the same mass as the earth and its atmosphere.

C. Its rock and atmosphere are about three times the mass of the earth.

D. It is heavier than the earth and has a rocky surface.

23. Which of the following is correct about the gravity of Gliese 581g？________

A. It fixes the mass on.

B. It is too small to keep anything on the ground.

C. It is enough to hold on to an atmosphere.

D. It helps Gliese 581g to balance between the earth and the sun.

24. What does shirt-sleeve weather probably mean？______

A. So warm that a jacket is not needed.

B. Changeable.

C. Cold.

D. Extremely cold.

25. How was Gliese 581g found？__________

A. A scientist discovered it on the way to the moon.

B. Some scientists found it with a telescope on the shuttle.

C. It was found using telescopes on the earth.

D. It was found with the help of a computer.

A.“Ha”是左脉，也称月亮脉，“tha”指右脉，也称太阳脉

B.“Ha”是右脉，也称月亮脉，“tha”指左脉，也称太阳脉

C.“Ha”是右脉，也称太阳脉，“tha”指左脉，也称月亮脉

D.“Ha”是左脉，也称太阳脉，“tha”指右脉，也称月亮脉

A.appreciating

B.appreciated

C.thanking

D.thanked

Some states have an income tax similar to ______ of the federal government。

A. tha。

B. those

C. this

D. these

A.puzzling

B.puzzled

C.surprised

D.surprising