施工现场的通风、照明、安全卫生、防护设施是属于施工环境中的（）的内容。
A．劳动作业环境
B．自然环境
C．社会环境
D．地理环境
参考答案：A
补全对话。
A:1_________ your mother 2 _________ to go to a movie?
B: Yes, she 3_________comedies very much.
A: So, 4_________you often go to a movie with 5 _________?
B: No, I usually stay at 6_________and 7_________ TV with my sister.
A: 8_________about your father? Does he like 9_________, too?
B: 10 _________,he doesn't like movies at all!
正确使用晶闸管应该注意哪些事项？
