以下C语言用户标识符中,不合法的是( )。
A._1
B.AaBc
C.a_b
D.a--b
参考答案:D
解析: 标识符主要由英文字母、数字和下画线构成,但开头字符一定是字母或下画线。
阅读理解。
1. Who is helping protect the environment?
A. Mrs. Gao
B. Mr. Xu
C. Miss Gao
D. Mr.Lu
2. When can people go to visit the old people in the old people’s home?
A. On Monday.
B. On Wednesday.
C. On Friday.
D. On Saturday.
3. What does the second piece of news call on people to do?
A. To stay with the poor.
B. To visit old people.
C. To help the poor.
D. To collect rubbish.
用人单位应当自与职工终止或解除劳动合同()个工作日内办理劳动用工备案手续。
A.7
B.15
C.30
D.10