()――井下高压层的地层流体(油、气或水)把井内某一薄弱地层压破,流体由高压层大量流入被压破的地层内的现象。
参考答案:地下井喷
按要求改写句子
1. He can come to my party this evening. (改为否定句)
He _____ _____ to my party this evening.
2. Tom went home by bus. (对画线部分提问)
_____ _____ Tom _____ home?
3. Linda can sing many French songs. (改为一般疑问句并作肯定回答)
— _____ Linda _____ many French songs?
— _____, _____ _____.
4. We're studying for the test. (对画线部分提问)
_____ _____ you studying?
5. I have to do my homework on Sunday. (改为一般疑问句)
_____ _____ _____ to do your homework on Sunday?
手工电弧焊主要根据()、()和()选择焊条。焊一般碳钢和低合金钢主要是按()原则选择焊条的强度级别。