构成比为
A.相对比也称构成比B.构成比反映某现象发生的强度C.反映某事物内部各部分占全部的比重D.反映两个有关联指标之比E.某一现象在时间顺序上的排列
参考答案:C
— May I speak to your manager Mr. Williams at five o'clock tonight?
— I'm sorry. Mr. Williams _____ to a conference long before then. [ ]
A. will have gone
B. had gone
C. would have gone
D. has gone
下列树种中,先展叶后开花的树种是()
A.苹果
B.杏
C.梨
D.桃