短管的水力计算必须同时考虑()
A.沿程水头损失
B.位置水头
C.局部水头损失
D.流速水头
参考答案:A, C, D
I don't think a taxi runs _____ as an underground train. [ ]
A. as faster
B. faster
C. as fast
D. the fastest
IOS平台基于指尖尺寸的界面设计规律是().
A、32
B、44
C、88
D、48