易腐货物容许运输期限须大于铁路规定的运到期限（）日以上。
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矿浆准备器上大口径的入料管是进清水和滤液，小口径入料管是进矿浆。
A. 正确
B. 错误
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
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
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