试题与答案

汽车发动机的额定功率为60KW,质量为2000kg,当汽车在水平路面上行驶时受到

题型:计算题

题目:

汽车发动机的额定功率为60KW,质量为2000kg,当汽车在水平路面上行驶时受到阻力为车重的0.1倍,汽车以额定功率在水平路面上从静止启动,(g取10m/s2)求:

(1)汽车在水平路面上能达到的最大速度;

(2)当汽车速度为10m/s时的加速度;

(3)若汽车从静止启动达到最大速度用时50s,则汽车启动过程通过的距离是多少?

答案:

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     Why does the Leaning Tower of Pisa in Italy lean? It leans because of a mistake. It has leaned almost

 since the day the tower was built. (1) In 1174, the people of Pisa, Italy wanted to build a bell tower.

 They wanted the tower to be the most beautiful bell tower in Italy. The city also needed a bell tower

 because the church did not have one.

     As soon as the first floor of the building was finished, the tower started to lean. Builders tried to make

  the building straight by adding more floors, but the Leaning Tower only got worse as the tower grew

 180,years, it, took, to, almost, the, tower, finish (2) Like all old buildings, it is also falling apart.  If

 someone cannot figure out a way to save the tower, the Leaning Tower of Pisa will fall down in less than

 200 years.

1. 请将( 1) 处划线句子翻译成汉语。

     ____________________________________________________

2. Why did the people of Pisa build the Leaning Tower?

     __________________________________________________________

3. What action did the builder take to make the tower straight?

      __________________________________________________________

4. 请将( 2) 处划线部分排列成一个通顺的句子。

     _______________________________________________________

5. What's the Chinese meaning of "figure out"?

   ____________________________________________________________

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