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【单选题】
Suppose a panel of economists predicts that a nation's real GDP per capita will double in approximately 20 years. According to the rule of 70, what must be the predicted annual growth rate of real GDP per capita?A.
140%
B.
3.5%
C.
2.85%
D.
14%
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【判断题】空警200警机创造了世界预警机发展史上的9个第一,突破100余项关键技术,累计获得重大专利近30项,是世界上看得最远、功能最多、系统集成最复杂的机载信息化武器装备之一。
A.
正确
B.
错误
【单选题】Why is it necessary to extend ventilators of gasoline powered vessels to the bilges ________．
A.
To keep them dry，and thus easier to clean
B.
To remove fuel vapors which are heavier than air
C.
To provide adequate air to the engines
D.
To cool the machinery areas
【单选题】第二篇Listening Comprehension: Why is it necessary to give a coin to someone when you
A.
11：第二篇Listening Comprehension: Why is it necessary to give a coin to someone when you give him a present with a sharp edge or point? A.To specially celebrate his birthday.
B.
To express some special meaning which you dare not tell directly.
C.
To wish for a long-lasting friendship.
D.
To wish your friend good luck in his life.
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