一个潮汐模型,按弗劳德准则设计,长度比尺为2000,则原型中的一天相当于模型时间的()。
A.9.6min
B.18.9min
C.21.7min
D.32.2min
参考答案:D
—I hear Yang Yan made an English speech at school yesterday.
—_______, and _______.
A.So she did; so did I
B.So did she; so I did
C.So she was; so I was
D.So was she; so I was
耐压试验的目的是什么?