网球最有影响的赛事称为大满贯，分别是指 （）、 （）、美网 和 （） 。
参考答案：温网；澳网；法网
Which one of the following Federal Reserve monetary policies, when pursued in line with the U. S. government’s fiscal policies, would help increase aggregate demand during a period of high unemployment（）
A. An increase in the reserve requirements for financial institutions.
B. A decrease in the discount rate.
C. An increase in the margin requirements at brokerage firms.
螃蟹是用（）呼吸的。
A.嘴
B.鼻孔
C.腮
D.耳朵
