The height of tide is the （）.
A. depth of water at a specific time due to tidal effect
B. difference between the depth of the water and the area's tidal datum
C. difference between the depth of the water and the high water tidal level
D. difference between the depth of the water at high tide and the depth of the water at low tide
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In the United States,educational policies are determined by（）
A. the federal government
B. female only institutions
C. single sex institutions
D. coeducation institutio
高压供电系统计算三相短路电流时，一般高压架空线每千米电抗值为（）Ω。
A. 0.2
B. 0.3
C. 0.4
D. 0.5
某水文变量频率曲线，当、Cs不变，增加Cv值时，则该线呈反时针方向转动。
A. 正确
B. 错误
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