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【单选题】
机车、轨道车的鸣笛鸣示，警报信号的鸣示（）。A.
三短声
B.
一长三短声
C.
二短一长声
D.
一长两短声
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反馈参考答案：
举一反三
【简答题】表征废水水质的指标有（）、（）、（）、（）等指标。
【简答题】常用于表征废水水质的指标有哪些？
【单选题】在平地测量时,A43路线长度0.64km,共6站,B-C路线长度0.32km,共4站,C-A路线长度0.48km,共6站,三等水准测量高差闭合差限差是()mm
A.
12
B.
14
C.
16
D.
24
【单选题】What advice or suggestions did Pete want to get from Fran?
A.
To tell him whether the Chinese students were enjoying themselves at his expense.
B.
To tell him whether the Chinese students were trying to get something from him.
C.
To tell him whether he should talk to the Chinese students next time.
D.
All of the above.
【简答题】表征污水和废水微生物学特征的污染指标有哪些？
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