把鱼缸中的水换成凉白开,没有了细菌鱼会生活得更好。
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白开水在沸腾的时候把大量溶解在水里的氧赶走了,另外煮过的白开水把有用的物质净化了
句型转换。
1. Would you please look after the bags for me?(改为同义句)
Would you please _____ _____ _____ the bags for me?
2. I like to wash the plates because it's relaxing.(对画线部分提问)
_____ _____ you _____ to wash the plates?
3. My brother borrowed a dictionary from Tim just now.(改为同义句)
Tim _____ a dictionary _____ my brother just now.
4. Could you please not sweep the floor now?(改为同义句)
_____ _____ the floor now!
5. He needs to do it like that.(改为一般疑问句)
_____ he _____ _____ _____ it like that.
给水排水厂站中,对钢筋(预应力)混凝土水池(构筑物),设计上不作要求的混凝土性能是()。
A.防腐
B.抗渗
C.抗裂
D.抗冻