问题 填空题

某同学的眼睛是近视眼,戴眼镜时能看清书上的字,摘下眼镜时为了能看清书上的字,他应该把书______(选填“靠近“或“远离“)眼睛,字在他的视网膜上所成的像是______(选填“正立“或“倒立“)的.

答案

近视眼的表现是看不清远处的东西,即是由于晶状体太厚,其折光能力太强,或眼球的前后方向太长,使得像成在视网膜的前方造成的,故近视眼的同学,戴眼镜时能看清书上的字,摘下眼镜时为了能看清书上的字,他应该把书靠近眼睛;人眼好比是一架照相机,即人所看到的景物一定在眼球的晶状体的2倍焦距以外,在视网膜上成的是一个倒立、缩小的实像,该像经过大脑处理后,使得我们看到的物体的像是正立的.

故答案为:靠近;倒立.

阅读理解

阅读理解。

     Dragon Boat Festival is a funny Chinese holiday. Usually, it's around June or July. Both children and adults

like this holiday.

     First, there are dragon boat races. Dragon boats are very long. They are painted in bright colours. In each

boat, there are many people rowing. There's also somebody beating a drum (击鼓). The winners of the races

can get a lot of money.

     During Dragon Boat Festival, people also eat a special kind of rice dumplings. To make one of these rice

dumplings, people prepare meat, vegetables and other things. Then they can make different flavors of

dumplings. Some are sweet, and some are salty (咸的). They all taste good. People give them to friends.

     On the evening of the holiday, families have a big meal together. Dragon Boat Festival is a great time for

everybody.

1. When is Dragon Boat Festival? 

A. Every June fifth.

B. Twice a year.

C. It's around June or July.

D. In winter.

2. How do Chinese people celebrate the festival?

A. Eating mooncakes.

B. Eating rice dumplings.

C. Holding dragon boat races.

D. Both B and C.

3. Which of the following about dragon boats is TRUE?

A. They are very long.

B. They have many flowers.

C. They are full of flags.

D. Babies often row them.

4. The meaning of the word "flavors" in Chinese is _________.

A. 风情

B. 情趣

C. 味道

D. 特点

5. Which is NOT the way (方式) to celebrate Dragon Boat Festival?

A. Having a big meal together.

B. Eating jiaozi and wonton (馄饨).

C. In memory of (纪念) Qu Yuan.

D. Holding dragon boat races.

单项选择题