露天矿田是指划归（）露天矿开采的矿床或其—部分。
A.一个
B.两个
C.三个
D.多个
参考答案：A
If a firm announces an unexpectedly large cash dividend, the efficient market hypothesis (EMH) would predict which of the following price changes at the announcement（）
A. An abnormal price change to occur before the announcement.
B. An abnormal price change to occur at the time of the announcement.
C. A gradual price change to occur for several weeks after the announcement.
苍术不具有的功效是（）
A.燥湿
B.发汗
C.健脾
D.止呕
E.明目
