问题
单项选择题
《缺氧危险作业安全规程》中规定，缺氧场所是指空气中的氧含量低于（）的状态
A.18.5%
B.19%
C.19.5%
答案
参考答案：C
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《缺氧危险作业安全规程》中规定，缺氧场所是指空气中的氧含量低于（）的状态
A.18.5%
B.19%
C.19.5%
参考答案：C
| 用括号中所给词的正确形式填空。 | |
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| Tom is in a football club. He works very long 1 . He likes playing football. 2 he thinks it is very 3 . He 4 has a great sports collection. He usually gets up at 5:20.At 5:40 he plays tennis with his son. After that he brushes his 5 . At 7:15 he eats breakfast. He goes to club at 7:30. He usually has 6 in his club. In the afternoon he gets home 7 the club. He eats dinner 8 his family. He 9 TV in the evening. He goes to bed very 10 . |