外阴鳞状细胞癌最多见的发病部位是A． * * 口B．会阴C．小阴唇D．阴蒂E．大阴唇

选词填空。

1. Have you done your homework _____? (for, just, yet)

2. I have _____ been to Chengdu. (ever, never, yet)

3. He has _____ washed the dishes. (already, ever, for)

4. He has worked there _____ he left school. (already, just, since)

5. Have you cleaned your room _____? (for, just, yet)

6. She has known Sam _____ nine years. (for, never, since)

7. They have _____ arrived. (ever, just, yet)

8. Have you _____ ridden a horse? (ever, for, yet)

9. She has known Fred _____ they were at primary school. (already, just, since)

10. We haven't completed the project _____. (already, for, yet)

软件开发环境是全面支持软件开发全过程的 【4】 集合。

宫颈癌

A．EB病毒
B． * * 瘤病毒
C．乙型肝炎病毒
D．HTLV病毒

如果陈某卖马时向赵某说明马是拣到的，但赵某仍支付相当价款，郭某能否向赵某要求取回马为什么

对甲、乙两企业职工工资进行抽样调查，已知两企业职工工资标准相同，抽查的职工人数也相同，但乙企业职工人数比甲企业多一倍，若采用纯随机不重复抽样，则两企业的抽样标准误（）。

A.相等

B.甲企业大

C.乙企业大

D.谁大谁小不能定