问题 问答题

一辆小轿车,以72km/h的速度在平直公路上匀速行驶,每100km消耗的汽油为10L(1L=1dm3).已知汽油的密度为0.71×103kg/m3.求:

(1)该汽车匀速行驶100km所用的时间是多少?

(2)10L汽油的质量是多少?

答案

(1)所用的时间t=

s
v
=
100km
72km/h
≈1.39h;

(2)10L汽油的质量是m=ρV=0.71×103kg/m3×0.01m3=7.1kg.

答:(1)该汽车匀速行驶100km所用的时间是1.39h;

(2)10L汽油的质量是7.1kg.

阅读理解

My families often go shopping at weekends. My father drives my mother and me to the supermarket. We all like shopping very much. We always buy some fruits and vegetables. At first, we go to buy some fruits. There are many kinds of fruits. My father likes bananas. We buy some bananas for him. My mother likes apples because she says apples can make her more beautiful.

We buy some red apples for her. I like pears. But today pears are sold out(售完,卖完), so I have to choose another kind of fruit. Oranges look good, and I buy some oranges. And next, we go to buy vegetables are fresh. We buy some broccoli, tomatoes and carrots. I don’t like carrots, but my parents say they are good for my eyes. After shopping, it’s me for lunch. We have lunch nearby. And then we go back home.

一、根据短文内容填空(每空一词).

My father drives my mother and me to the supermarket. We buy some 小题1:      for my father, some 小题2:    for my mother. We want to buy some pears for me, but they are sold out, so we buy some 小题3:     for me. And then we buy some broccoli, tomatoes and 小题4:      . 小题5:     we go back home, we have lunch near the supermarket.

二、在文章中找出下面的英语词组。

小题6:看上去很好                  小题7:首先,一开始                    

三、把文章中的划线句子分别翻译成汉语。

小题8:                                               

小题9:                                               

小题10:                                             .

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