单项选择题
未知题型 有一水跃产生于水平无压圆管中,已知通过的流量Q=1.0m3/s,管径D=1.0m,跃前水深h1=0.4m,求跃前断面形心在水面下的距离和跃后水深h2。
单项选择题 ______ you fulfill the terms of the credit we will accept and pay on maturity the draft presented to us under this credit and if required, ______ discounting facilities at current rates. A.Provided, provide B.Provided, providing C.Provide, providing D.Provide, provide
未知题型 长时记忆最主要的编码方式是( )。[统考2008研] A.视觉编码 B.听觉编码 C.语义编码 D.形象编码