液体式压力仪器是依据()原理,利用液柱的()来测试压力的仪器。
A.流体力学;变化情况
B.流体动力学;高度
C.流体静力学;高度差
D.流体力学;高度
参考答案:C
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When I was waiting for the bus, Tom came in his father's car. [ ]
A. on
B. in
C. to
D. by