问题 填空题
有A、B两条绳,第一次剪去A的
2
5
,B的
2
3
;第二次剪去A绳剩下的
2
3
,B绳剩下的
2
5
;第三次剪去A绳剩下的
2
5
,B绳剩下的
2
3
,最后A剩下的长度与B剩下的长度之比为2:1,则原来两绳长度之比是______.
答案

(1)a绳第二次剪去:(1-

2
5
)x
2
3
=
2
5

第三次剪去:(1-

2
5
-
2
5
)x
2
5
=
2
25

a绳还剩下:1-

2
5
-
2
5
-
2
25
=
3
25

(2)b绳第二次剪去:(1-

2
3
)x
2
5
=
2
15

第三次剪去:(1-

2
3
-
2
15
)x
2
3
=
2
15

b绳还剩下:1-

2
3
-
2
15
-
2
15
=
1
15

(3)最后a剩下的长度与b剩下的长度之比为2:1,那么两绳长度的比为:(2÷

3
25
):(1÷
1
15
)=10:9

故答案为:10:9.

阅读理解

阅读理解。

                                                        Families and cars

     Americans with small families own a small car or a large one. If both parents are working, they

usually have two cars. When the family is large, one of the cars is sold and they will buy a van (大蓬

货车).

     A small car can hold four persons and a large car can hold six persons but it is very crowded. A

van can hold seven persons easily, so a family with three children could ask their grandparents to go

on a holiday travel. They could all travel together.

     Mr. Hagen and his wife had a third child last year. This made them sell a second car and buy a van.

Its sixth and seventh seats are used to put other things, for a family of five must carry many things when

they travel. When they arrive at their grandparents' home, the things are brought into the two seats, and

then it can carry the grandparents.

     Americans call vans motor homes. A motor home is always used for holidays. When a family are

traveling to the mountains or to the seaside, they can live in their motor home for a few days or weeks.

All the members of a big family can enjoy a happier life when they are traveling together. That is why

motor homes have become very popular. In America there are many parks for motor homes.

根据短文内答问题。

1. How many people can a van generally hold?

    ________________________________________________

2. What did Mr. Hagen and his wife do after they had a third child?

    ________________________________________________

3. What do Americans call vans?

    ________________________________________________

4. What do Americans usually use motor homes for?

    ________________________________________________

5. There aren't many parks for motor homes, are there?

    ________________________________________________

问答题 简答题