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【简答题】

做悬浮物的水样如何采集?

题目标签:悬浮何采水样
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【单选题】Passage Two Questions 66 to 70 are based on the following passage: If an agreement signed in Germany works out, travelers of this Asian city may one day be able to move from the downtown area to its n...

A.
It is difficult to see fingerprints with human eyes.
B.
There are special ways to recover a suspect’s fingerprints.
C.
Even a small part of a fingerprint is useful for identification
D.
Suspects usually try to avoid leaving their fingerprints at the scene.

【单选题】测定溶解氧的水样必须()

A.
现场现取现测
B.
外地取回的水样亦可测
C.
现场取样且必须溢流3min
D.
温度不能超过35℃