【单选题】听力原文: Large modern cities are too big to control. They impose their own living conditions on the people who inhabit them. City-dwellers are obliged by their environment to adopt a wholly unnatural way...
A.
The people are not in regular communication with the rhythm of nature.
B.
The people can't enjoy sunshine and fresh air.
C.
Modern cities offer better schools, more chances of employment.
【单选题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You shoul...
A.
developing genetically modified or nutritionally improved crops
B.
incorporating pest-resistant or virus-resistant genes into seeds of crops
C.
improving the ability of seeds to resist water shortages in certain regions
D.
identifying genes that helps neutralize aluminum toxicity in crops