What do the recent studies show according to the news？
A. Human activities make the Earth warmer.
B. Glaciers are melting faster.
C. Stronger hurricanes are rising.
D. Climate changes dramatically.
In an efficient market．
A. profit opportunities remain a very brief time.
B. only experts can grasp the profit opportunities.
C. people without insights don't get much profit.
D. anyone who knows the hot tips can gain profit.
The following countries are the rising stars in the aerospace industry EXCEPT
A. Russia.
B. India.
C. France.
D. China.
正确答案是（）
A. On the contrary
B. On the average
C. On the whole
D. On the other hand
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