问题 单项选择题

一个弹力球从128米的高处自由落下,每次着地后又跳到原来高度的一半落下,第6次着地到第7次着地所经过的路程为多少米()

A.12米

B.10米

C.4米

D.6米

答案

参考答案:C

解析:

第1次着地后弹起的高度为128×=64(米),第2次弹起的高度为64×(米)……第6次弹起的高度为128×()6=2(米),再落下来2米后第7次着地,第6次着地到第7次着地所经过的路程为2+2=4(米)。本题正确答案为C。

仿写题,造句

完成句子。

阅读下列各小题,根据每句后的汉语提示,用句末括号内的英语单词完成句子.

1.Another training center ____________________ in Xi'an, capital of Shaanxi Province, tomorrow, which excites us all. (set)

明天,另一所培训中心将会在陕西省会西安建立,这使我们都很兴奋.

2.Can you name the provinces through ________________? (flow)

你能说出黄河流经的省份的名称吗?

3.____________________, water is what makes life possible. (know)

众所周知,水使生命的出现成为可能.

4.Following the global economic crisis, a large number of companies were closed down and many

people ____________________. (work)

全球经济危机之后,大量公司倒闭,许多人失去了工作.

5.Mother always tells him ____________________in the face of difficulty. (heart)

母亲总是告诉他,面对困难时不要灰心.

6.I had to ____________________ when I came across some new words. (turn)

当我遇到一些新单词时,我不得不求助于词典.

7.If I don't get my homework finished in time, I ____________________. (trouble)

我要是不及时把作业做完,我会有麻烦的.

8.Only yesterday ____________________, which was a big surprise to him. (tell)

直到昨天他的父亲才告诉他真相,这使他很惊诧.

9.In his life, he has always tried to help those ____________________. (fortunate)

他的一生都在努力帮助那些比他不幸的人.

10.You cannot imagine ____________________ when they received those nice Christmas presents.

(excite)

你无法想象当收到那些美丽的圣诞礼物时他们有多么激动.

单项选择题