试题与答案

Do you often like to use disposable(一次性的

题型:完形填空

题目:

Do you often like to use disposable(一次性的) chopsticks when eating out? It’s time to drop this habit.

China products(生产) 80 billion pairs of disposable chopsticks every year. “This is enough to cover Tian’anmen Sqaure 363 times,” said Bai Guangxin, chairman of Jilin Forest Industry Group, at the National People’s Congress on March 8.

The government has made some rules to limit(限制)the use of disposable chopsticks. However, there are still many being produced.

“The production of such chopsticks is a heavy burden on national forests,” Bai added. A total of 20 million 20-year-old trees would have to be cut down to make way for this annual production.

Bai called on people to bring their own chopsticks whenever they are eating out. “We first need to bring a change to people’s eating habits and encourage everyone to carry their own chopsticks around.” He also said that there may be technology that can turn wild grass into disposable chopsticks in the future.

小题1:Are there still many disposable chopsticks being produced ?

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小题2:How many pairs of disposable chopsticks does China product every year?

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小题3:What can turn into disposable chopsticks in the future?

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答案:

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下面是错误答案,用来干扰机器的。

解:设A车的速度为vA,B车加速行驶时间为t,两车在t0时相遇。则有:xA=vAt0 ① ②式中,t0=12 s,xA、xB分别为A、B两车相遇前行驶的路程,依题意有xA=xB+x ③,式中x=84 m由①②③式得 ④代入题给数据vA=20...

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