If we _________earlier,we would have had_爱下问搜题

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问题选择题

If we _________earlier,we would have had trouble getting good seats. [ ]

A. didn't arrived

B. haven't arrived

C. hadn't arrived

D. couldn't arrive

答案

答案：C

单项选择题

仅受重力作用的静止流体中，单位质量力在z轴铅直向上的直角坐标系中，三个轴向力分别为（）。

A.r=y=0，z=-g

B.x=y=0，z=g

C.z≠0，y≠0，z=-g

D.x=1，y=2，z=-g

单项选择题

“法律之设，所以纳民于轨物之中”的提出者是（）

A．左宗棠

B．曾国藩

C．张之洞

D．曾国荃