坦克有宽宽的履带，可以减小______；潜水员潜水的深度不同，需要的装备不同是因为______．
（1）坦克有宽宽的履带是在压力一定时，增大受力面积来减小坦克对地面的压强．
（2）液体的压强随深度的增加而增大．潜水员在水中不同深度，穿的潜水衣不同，目的是能够抵挡不同的水压，潜入水中越深，压强越大，所以潜水员潜水的深度不同，需要的装备不同．
故答案为：压强；液体的压强随深度的增加而增大．
| 完形填空。 One day a great general ( * * ) asked his soldiers, "What's the strongest power in the world?" Four of his soliders 1 their hands. They all wanted to answer the question. The general asked the first man to speak. The first man is younger 2 the other three, and he was not strong. He said, "My gun is the strongest. It can kill 3 ." "Thank you. 4 , please."The second man was very strong. He said,"I don't 5 . Soldiers use guns, so the soldier is the strongest."The 6 man said, "Soldiers use guns, 7 our general gives orders (命令).So I think our general is the strongest."The fourth man was the 8 . He said, "Love is the strongest. For love people don't 9 guns."The general smiled and 10 to him. | ||||
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