下安全措施正确的是（） A.对激光系统监控管理 B.对工作环境监_爱下问搜题

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问题单项选择题 A1/A2型题

下安全措施正确的是（）

A.对激光系统监控管理

B.对工作环境监控管理

C.个人防护

D.以上都是

E.以上都不是

答案

参考答案：D

填空题

看图，选用方框中的单词完成对话。

brother grandfather father sister grandmother

1. —Is she your mother?
    —No, she isn't. She is my ________.
2. —Is he his uncle?
    —No, he isn't. He is my ________. He is in Class One, Grade One.
3. —Is that your _______?
    —Yes, it is.
4. —Is she your friend?
    —No, she isn't. She is my ________.
5. —Is that Jack's uncle?
    —No, it's his _______.

判断题

（）角质层是指甲后缘的一部分。