一辆汽车每分钟行34千米,已经行了34小时,一共行了多少千米?正确列式是( )A

题型:选择题

问题:

一辆汽车每分钟行
3
4
千米,已经行了
3
4
小时,一共行了多少千米?正确列式是(  )
A.
3
4
×
3
4
B.
3
4
×1000×
3
4
C.
3
4
×60×
3
4
考点:整数,小数,分数,百分数和比例的复合应用题
题型:选择题

阅读理解。

    Skin-diving (潜泳) is a new sport today. This sport takes you into a wonderful new world. It is like a

visit to the moon! When you are under water, it is easy for you to climb big rocks, because you are no

longer heavy.

    Here, under water, everything is blue and green. During the day, there is plenty of light. When fish swim

nearby, you can catch them with your hands.

    When you have tanks (罐) of air on your back, you can stay in deep water for a long time. But you must

be careful when you dive in deep water.

    To catch fish is one of the most interesting parts of this sport. Besides, there are more uses for skin-diving.

You can clean ships without taking them out of the water. You can get many things from the deep sea.

    Now you see that skin-diving is both useful and interesting.

1. Skin-diving can take you to ______. [ ]

A. the moon

B. the mountains

C. a dirty world

D. an interesting and new world

2. This sport ______. [ ]

A. is like to travel on the moon

B. is like to play on water

C. is like to visit a new country

D. is like to climb a big rock

3. You can stay in deep water for a long time if ______. [ ]

A. you climb big rocks

B. you catch fish very easily

C. you bring something to eat

D. you take tanks of air with you

4. Which of the following statements is NOT true? [ ]

A. Skin-diving is a new sport.

B. Skin-diving is like visiting the moon.

C. The only use of skin-diving is to have more fun.

D. Skin-diving is not only interesting but useful.

5. Skin-diving is a interesting sport because ______. [ ]

A. you can catch fish with your hands

B. you can clean the ship in the water

C. you can get many things from the deep sea

D. all of the above

题型:选择题

两个相似三角形的面积比是9:16,则这两个三角形的相似比是 [ ]

A.9:16

B.3:4

C.9:4

D.3:16

题型:选择题

关于缔约过失责任,下列表述错误的是()。

A.缔约过失责任是由于一方当事人违反合同义务而产生的

B.缔约过失责任的基础在于诚实信用原则

C.缔约过失责任发生在合同订立过程之中

D.缔约过失责任的赔偿范围是履行利益损失

题型:选择题

下列可能导致发动机排白烟的有()。

A.柴油中含有水

B.缸体和缸盖有裂纹

C.汽缸垫损坏,冷却液进入燃烧室

D.天气温度低

题型:选择题

下列不属于复合肥中含有的元素的是()。

A.氮

B.氨

C.磷

D.钾

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