秘书为上司出差筹备的商务勾当文件资料有()。
A.公私人介
B.通信录
C.作息时刻表
D.信用卡
参考答案:A
用所给词的正确形式填空。
1. Why _________ (not) dinosaurs have ears?
2. I'm _________ (do) my homework.
3. Dinosaurs and people _________ (be) different.
4. Here are some other _________ (thing) you can turn on and turn off.
5. We are _________ (same).
同一土壤疏松时比坚实时的容重小。