问题 单项选择题

据某地区统计,今年中小学生中肥胖学生约占10%,而且,肥胖学生人数正在以8%的速度增长。假设近年中小学生的总量变化不大,据此我们可以推算出,明年该地区中小学生中肥胖学生的比例约为______。

A.10.08%
B.10.8%
C.11.8%
D.18%

答案

参考答案:B

解析:计算过程如下:假设该地区中小学生的总人数为T,其中肥胖学生占10%,那么,肥胖学生的人数为0.1T。已知肥胖学生的年增长速度为8%,那么,明年的肥胖学生人数约为0.1T×(1+0.08)0由于假设明年该地区中小学生的总量变化不大,也就是说仍然为T,所以明年的肥胖学生人数所占的比例约为0.1T×(1+0.08)÷T0.108=10.8%。

阅读理解

阅读与表达(共5小题,每小题2分)

Wang Xiaojun is 12 years old. He lives in the country in Hubei Province. Today is his birthday. His parents prepare a nice dinner for him, but the boy says, “I won’t have the dinner because after the dinner, today is over, and parents are leaving for Shenzhen tomorrow. I don’t want to let them go.”

It is the first birthday that Wang Xiaojun is spending with his parents stayed in Shenzhen and worked to make money. They haven’t seen their son for three years. Tomorrow they have to leave home to go to Shenzhen.

Wang is not the only stay-at-home child. In the country of China, there are more than 20 million children staying at home without their parents. Stay-at-home children face a lot of problems. Many of them stay with their grandparents. They get less care from parents. They often feel lonely. Some of them don’t study well because their parents can’t help them with their study.

The Chinese government now cares about the children very much and is trying to solve their problems.

小题1:Is it Wang Xiaojun’s first birthday?

                                                            

小题2:There are many stay-at-home children in the country of China, aren’t there?

                                                            

小题3:Why don’t some of the stay-at-home students study well?

                                                            

小题4:How long haven’t Wang Xiaojun seen his parents?

                                                            

小题5:In China,how many children staying at home without their parents?

                                                           

单项选择题