搜题请搜索小程序“爱下问搜题”
问题 选择题

下列例子中，能够增大压强的是（　　）

A．刀刃都磨得很薄

B．房屋的墙基都做得比墙厚

C．载重汽车的轮胎做得比小汽车的宽

D．书包的带做得扁而宽

答案

A、刀刃都磨得很薄，在压力一定时，减小受力面积增大压强，符合题意．

B、房屋的墙基都做得比墙厚，在压力一定时，增大受力面积减小压强，不符合题意．

C、载重汽车的轮胎做得比小汽车的宽，在压力一定时，增大受力面积减小压强，不符合题意．

D、书包的带做得扁而宽，在压力一定时，增大受力面积减小压强，不符合题意．

故选A．

补全对话，情景问答

补全对话。

A: Excuse me, 1 ______ the Renmin Park?

B: Go 2 ______ this street, then 3 ______ right on the first street.

A: 4 ______ 5 ______ is it from here?

B: It's about forty minutes on foot.

A: Can I 6 ______ a bus?

B: Yes.

A: 7 ______ 8 ______ do I need to take?

B: The No. 205 bus.

A: But where is the bus stop?

B: It's 9 ______ the other side of the street.

A: Thank you very much.

B: 10 ______ welcome.

1._______ 2._______  3._______ 4._______ 5._______

6._______ 7._______ 8._______ 9._______ 10._______
查看答案
选择题

As is often pointed out, knowledge is a twoedged weapon which can be used______ for good or evil. [ ]

A. similarly  

B. properly

C. equally  

D. widely
查看答案