动火地点空气中可燃物含量为（）合格。A．≥0.1% B．≤0.2% C．≤0.25%_爱下问搜题

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问题单项选择题

动火地点空气中可燃物含量为（）合格。

A．≥0.1%

B．≤0.2%

C．≤0.25%

D．≤0.3%

答案

参考答案：B

选择题

--What great changes! It’s years since we_____ each other last time .

-- Believe it or not, It’s the second time that we _____a face –to- face talk

A．met; had had

B．have met; had

C．had been; had

D．met; have had

单项选择题

骨气鼓征见于（）。

A.骨结核

B.骨髓炎

C.痛风

D.类风湿关节炎

E.骨巨细胞瘤