用工程大气压表示压力时,其单位符号用()表示。A、Pa B、MPa C、kgf/cm2D

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问题:

用工程大气压表示压力时,其单位符号用()表示。

A、Pa

B、MPa

C、kgf/cm2

D、at

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      I'm Alice. This is our school. It is big. This is my classroom. It's big and clean. Look! That is my desk. It is

yellow. My teacher is Miss Li. She is in the classroom. She is a good teacher. I like my teacher.

( ) 1. My name is Alice.

( ) 2. My school is small.

( ) 3. My classroom is dirty (脏的).

( ) 4. My desk is yellow.

( ) 5. Miss Li is not in the classroom.

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