下列关于if和else的配对规则描述正确的是( ) A．else总是_爱下问搜题

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问题单项选择题

下列关于if和else的配对规则描述正确的是( )

A．else总是和前面最远的if配对
B．else总是和前面最近的if配对
C．if和else的配对按程序缩进格式进行
D．else可以和前面所有的if配对

答案

参考答案：B

填空题

请从方框中选择正确的词组，用其适当的形式填空

pick up , cut up , be supposed to , after all, hang out , drop by , table manners , be used to,
shake hands , dress up

1. You                                       ask the teacher's permission if you want to leave the classroom.
2. You should                        when you meet someone for the first time.
3.                     whenever you're in the city.
4. He wrote to say they couldn’t give me a job                      .
5. She kept                        magazines and putting them down again.
6. I don't know about                        . in your country.
7. The boy                                      getting up early.
8. Don't                          the apples.
9. My friends often                          in the mall.
10. The children in China                          during the Spring Festival.

填空题

线路综合维修作业轨道高低静态验收容许偏差为（）。