皮皮学，免费搜题
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搜题
【单选题】
火灾发生后,火场温度为800°C,周围环境温度为20°C,如果每秒流入火场的空气流量为2.0 ,开口通畅条件下,则每秒流出火场的高温火灾烟气流量为( )。A.
8.0
B.
7.3
C.
0.5
D.
5.0
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】I delayed _______ your letter because I had been away for a week.
A.
answer
B.
answering
C.
writing
【单选题】I’m sorry I delayed_________ your letter because I have been quite busy these days.
A.
to answer
B.
to have answered
C.
answering
D.
answered
【单选题】下列各项中，不属于丸剂特点的是
A.
药量增减的变化
B.
药味加减的变化
C.
剂型更换的变化
D.
药味加减与药量增减变化的联合运用
E.
药味加减与剂型更换变化的联合运用
【单选题】I delayed _______ your letter because I had been away for a week.
A.
answer
B.
answering
C.
writing
D.
to post
【单选题】I quickly answered your letter, for, if I delayed, you ______ I was not concerned about your difficulties.
A.
had thought
B.
thought
C.
would think
D.
were thinking
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