问题
单项选择题
密闭空间作业职业危害防护中,空气中氧含量低于( )的可能引起死亡、失去知觉、丧失逃生及自救能力、伤害或引起急性中毒。
A.30%
B.28%
C.22%
D.18%
答案
参考答案:D
密闭空间作业职业危害防护中,空气中氧含量低于( )的可能引起死亡、失去知觉、丧失逃生及自救能力、伤害或引起急性中毒。
A.30%
B.28%
C.22%
D.18%
参考答案:D
完形填空。 | |||
This is a photo 1 Robert's 2 . 3 Robert. He is a student 4 Grade 1 5 No. 6 Middle School. The girl 6 an orange skirt is Ann, Robert's sister. The woman behind Robert is Mrs. Shute. She is Robert's mother. She is a teacher, but she teaches in 7 school. Mrs. Shute is standing 8 his daughter. He is working 9 a car factory. Robert's parents 10 young. This is a nice picture. | |||
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