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当前学科:水文勘测中级工
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五点法相对水深0.0、0.2、0.6、0.8、1.0的测点流速分别为0.21m/s、0.54m/s、0.50m/s、0.38m/s、0.12m/s,则该垂线平均流速为()m/s。
A . A、0.42
B . B、0.35
C . C、0.50
D . D、0.28
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