问题 填空题

溧阳燕山公园晚上的灯光亮起时,湖水上实景与湖中“倒影”交相辉映,形成一幅绚丽多彩的图案。已知燕山公园某处水深为2m,一路灯距水面5 m,则该路灯的“倒影”距水面_____m;若湖水再上涨0.5m,则该路灯与其对应“倒影”相距_____m。

答案

5 、9;

题目分析:本题根据平面镜成像特点中的物体和像到水面的距离相等,进行计算.因为彩灯距水面5m,由平面镜成像特点可知,则该彩灯的“倒影”距水面也是5m,

若涪江水再上涨0.5m,则彩灯距水面的距离为5m-0.5m=4.5m,那么该彩灯的“倒影”距水面也是4.5m,则该彩灯与其对应“倒影”相距45m+45m=9m.

点评:水外面的物体在水表面成的像,是光的反射形成的;我们看到水中的物体,是由光的折射形成的,注意加以区分.并且注意不要被“涪江水深为2m”这个无关的条件所干扰.

阅读理解

阅读理解。

Dear Zhang Hua, 

      Have you ever been to Thailand? It is a country in Southeast Asia. I've been in Thailand for a few days

with my parents. We are here for a holiday.

      Now we are staying in Bangkok(曼谷). It is the capital of Thailand and it is a very interesting place to

visit. Yesterday we visited some places of interest in the city. They are great! This morning we went shopping.

Bangkok is a wonderful place to shop for jewelry(珠宝)and clothes. My mother bought a nice necklace(项链).

My father and I bought some fashionable T-shirts.

      Thailand is called "Land of Smiles" because people here are very friendly. And it's true! When we eat in

the restaurants in Bangkok, the waiters are really nice and they are always smiling. Thai food is delicious, but

it is sometimes a little spicy for me. You can also get Chinese food here because a lot of Chinese people came

to live in Bangkok many years ago. Chinese food is very good, and it isn't as spicy as Thai food. Our American

food can also be found in Bangkok, however, I don't eat it. You know, I'd like to try new things when I travel.

      The weather has been very hot. Yesterday it rained and got a little cooler. But today it's hot again.

                                                                                                                       Yours,

                                                                                                                       Mary

根据短文内容,补全下列句子。每空词数不限。

1. Thailand is in ______ and it is called ______.

2. Most tourists go to buy ______ and ______ in Bangkok.

3. Mary thinks ______ is spicier than ______.

4. Mary doesn't eat ______food in Bangkok because she wants to ______ when she travels.

5. Because of the ______, it was ______ in Bangkok yesterday than today.

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