当前置泵入口压力下降,入口滤网差压超限时,要进行滤网的检查清理工作,否则会引起给水泵的汽化现象。
参考答案:对
找出下面句子中的错误并改正。
( ) 1. He want to see him very much.
A B C
( ) 2. Jenny watched Danny to play ping-pong last Sunday.
( ) 3. Good food is good at your body.
( ) 4. Here are some water.
( ) 5. He brushes his tooths every night.
“功能性精神障碍”则采用症状学的分类()