题目内容

目前常用的压电材料有()。

A. 石英晶体
B. 压电陶瓷
C. 金属膜片

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更多问题

压电式压力传感器测量稳态信号时误差较大。()

A. 对
B. 错

The passage tells us that (punctuality) is an essential element of American culture andAmericans are (punctual) for most events.

A. 对
B. 错

When scheduling an activity, the writer usually (logs) it into his agenda.

A. 对
B. 错

Generally, Americans will not wait long, ten minutes (at most).

A. 对
B. 错

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