Which of the following can be inferred from the last paragraph？
A. We have developed industry at the expense of countryside
B. We have forgotten what our original countryside looked like.
C. People living On islands should protect natural resources for their survival
D. We should destroy all the built up areas
查看答案
64
A. any
B. each
C. every
D. Some
在图3-12中，RL是一线圈，和它并联一二极管D。设二极管的正向电阻为零，反向电阻为无穷大。试问二极管在此起何作用？
？？The last sentence in the second paragraph implies that ______？？
A. people should create more natural environment areas
B. people would go on protecting national parks
C. certain areas of countryside should be preserved
D. people should defend the right to live in a peaceful environment
58
A. if
B. as if
C. though
D. as though
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