压力开关在报警时输出的信号为（）。 A.4~20mA信号 B.开关量信号 C.1~5_爱下问搜题

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问题单项选择题

压力开关在报警时输出的信号为（）。

A.4~20mA信号

B.开关量信号

C.1~5V信号

D.Hart数字信号

答案

参考答案：D

填空题

用方框内所给单词的适当形式填空，完成句子。每词限用一次。

invite chopstick loud except success

1. It's impolite to speak ________ at the table.
2. We all went hiking ________ Lin Lin. She was ill in bed.
3. Oscar Freire is a ________ cyclist. Many people like him.
4. Western people eat with knives and forks while Chinese use ________.
5. Tomorrow is my father's birthday. He will ________ many guests to my house.

判断题

细动脉壁透明变性常见于急进性高血压。