问题
单项选择题
当硫化氢浓度（）mg/m3时，可出现眼急性刺激症状，稍长时间接触引起肺水肿。
A.10～300
B.300～760
C.≥760
D.>1000
答案
参考答案：A
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当硫化氢浓度（）mg/m3时，可出现眼急性刺激症状，稍长时间接触引起肺水肿。
A.10～300
B.300～760
C.≥760
D.>1000
参考答案：A
从方框中选出适当的短语，并用其正确形式填空。
小题2:The number of people asking to go there is ____________. 小题3:The little boy ____________ little ____________ with his father. 小题4:Where is Jane? All of us ___________ her safety. 小题5:The police found that his escape from prison ___________the murder. |