更多"Rainforests may store much less car"的相关试题:
[单项选择]Rainforests may store much less carbon than we thought. It could be time to dramatically revise our estimates following the discovery that apparently similar forests hold vastly different amounts of the stuff. The finding is important because there are plans for governments worldwide to compensate tropical countries for protecting their forests as "carbon sinks" to curb global warming. If carbon cannot be counted, then dollars cannot be disbursed (支付).
Greg Asner of the Carnegie Institution for Science in Stanford, California, and colleagues say they used satellite mapping, laser probing of forest undergrowth from aircraft and local ground surveys across a large area of Peruvian rainforest to crack the problem of estimating how much carbon is locked up in forests. But the new technique has revealed a large, previously unknown variability in the density of carbon stored in apparently similar forests.
The Intergovernmental Panel on Climate Change says that there should be about
A. It has already been settled.
B. It has caused much dispute.
C. It is not as difficult as expected.
D. It is unlikely to be solved soon.
[单项选择]A. Less than 15 students. B. Less than 10 students.
C. About 20 students. D. About 25 students.
[单项选择]If k is an integer greater than 44 and less than 51，then which of the following could be the product of 11 and k ？（）
A. 565
B. 550
C. 500
D. 484
E. 440
[简答题]Teachers are paid considerably less than professions that require a simil ar amount of education and skill.
[单项选择]A. Less than three hours. B. More than three hours.
C. Less than four hours. D. More than four hours.
[单项选择]This kind of songbird sleeps much less during its annual ______, but that doesn’t seem to affect its flying.
A. emigration
B. migration
C. conveyance
D. transference
[填空题]Mr Zidane earns less than Michael Jordan.
[单项选择]Parents have to do much less for their children than they used to do, and home has become much less of a workshop. Clothes can be bought ready made; washing can be done at the laundry; food can be bought cooked, canned; bread is baked and delivered by the baker; milk arrives on the doorstep; meal can be had at the restaurant, the work’s canteen, and the school dining room.
It’s unusual now for father to pursue(追求)his trade of other employment at home, and his children rarely, if ever, see him at his place of work. Boys are therefore seldom trained to follow their father’s business, and in many towns they have a fairly wide choice of employment and so do girls. The young wage-earner often earns good money, and soon gains a feeling Of economic independence (经济上的独立). In textile areas it has been customary for mothers to go out to work, but this practice has become so widespread that the working mother is now not an unusual factor in a child’s home life, the number of married w
A. mothers have the practice to go to work
B. working mothers have no time to stay with their children at home
C. mother’s position in a family has been raised
D. young wage-earners are economically independent
