直接资本化法通常是采用（）的预期收益。
A.价值时点
B.未来第一年
C.收益期内的算术平均数
D.收益期内的中位数
参考答案：B
Having been robbed of economic importance, those states are not likely to count on very much in international political terms.
密封圈内径与电缆外径之差应不大于（）mm.
A.0.5
B.1
C.1.5
D.2
