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【简答题】
一点透视盒子,一张纸画二十个以上。
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皮皮学刷刷变学霸
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【简答题】With the world’s population estimated to grow from six to nine billion by 2050, researchers, businesses and governments are already dealing with the impact this increase will have on everything from f...
【单选题】World population will continue rising from the current 5 billion until about 2050, but if the trends of the 1980s continue, it will ______ at about 9 billion.
A.
level up
B.
level off
C.
level on
D.
level down
【单选题】According to the passage, the U.S. immigrants in the period from 2000 to 2050 will probably increase
A.
129 million
B.
54 million
C.
75 million
D.
28 million
【单选题】It can be inferred from the text that by year 2050 ______
A.
the species of plants and animals will shrink to one third of the original amount.
B.
the climate will become unsuitable for residence.
C.
migrate birds may be in danger because of changes in climate.
D.
most animals will change their habitats to a large extent.
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