比较大小:﹣3( )﹣7.
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Look and write. (看一看,写一写)
1. — How much are they? — They are _____yuan.
2. — Do you want _____ ? — Yes, _____ _____.
正在生产的油井关井测压力恢复,所求得的静止压力代表原始地层压力。