The phrase "size of the class" underlined in Paragraph 4 refers to the______.
A. number of light smokers
B. quantity of light cigarettes
C. number of plaintiffs
D. amount of money involved
What did space satellites capture recently？
A. The formation of ocean water.
B. Comets colliding with the earth's atmosphere.
Comets collisions and cosmic dust.
D. Comets falling into the ocean water.
The passage focuses primarily on______.
A. problems of post offices in Britain
B. the new courier service — EMS
C. the competition between private and international courier services
D. differences between EMS and DHL
金融工具的特征属于正相关的是()。
A. 流动性与收益性
B. 流动性与安全性
C. 偿还性与安全性
D. 收益性与安全性
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