看图补全对话。1. A: What is he doing? B: He __

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问题补全对话，情景问答

看图补全对话。

1. A: What is he doing? B: He __________________________.
2. A: Is he washing the clothes? B: No, he isn't. He's ______________.
3. A: What's the date today? B: It's _________________________. A: What's he doing? B: He's ________________________.

答案

1. is writing an e-mail 2. doing the dishes 3. July 12th, reading a book

单项选择题

安全生产检查是指对生产过程及安全管理中可能存在的事故隐患、危险与有害因素、安全缺陷等进行（）。

A.识别

B.检验

C.登记

D.查证

单项选择题

GPS系统中，哪个部分不需要接地（）

A.GPS蘑菇头

B.浪涌保护器

C.馈线窗前一米处

D.GPS蘑菇头下端一米处