问题 选择题

下列都是生产生活中与化学有关的问题,其中说法正确的是[ ]

①向装有奶粉或膨化食品的包装袋内充入氮气以延长保质期

②亚硝酸钠是无色、有咸味的晶体,可代替食盐做调味剂

③用湿润的淀粉试纸可检验食用盐中碘元素的存在

④某城市限制冬季燃煤供暖是因为燃烧煤会有二氧化硫产生

⑤磷元素有利于水生植物生长,因此不必限制含磷洗涤剂的污水排放

⑥氮氧化物是造成酸雨、光化学烟雾、臭氧空洞的主要原因,因此必须治理汽车尾气

A.①④

B.③⑤

C.①②⑥

D.②③⑤

答案

答案:A

单项选择题 A1/A2型题
阅读理解

阅读理解。

                                                                  Rainy Day Fun

     You wake up and the weather is all wet. What are you going to do today? Here are four ideas for you

to try when it's raining cats and dogs.

     Puppet (木偶) show

     You can create your own puppets with things your parents already have around the house. First, you'll

need some old socks or brown paper bags. Then get them decorated. Give your puppets names and funny

voices. You might want to make up a special story for them. Maybe one puppet lost his way home. Maybe

another puppet has superman powers. To make your show even better, use a cardboard box as a stage.

Build a castle Ask your parents for some old sheets, blankets, or comforters. Spread them over chairs or

other furniture to create a top-secret castle. Bring a flashlight, a good book to read, and maybe even a snack.

     Dress-up time

     Both boys and girls can have fun trying on old clothes. Ask your parents to let you try on old hats,

jewelry, shoes, and clothes. Do you want to be a doctor? You can pretend it in a doctor coat. Or maybe you

see yourself as a movie star. Ask your mom for her old dance dresses. Don't forget the earrings and high

heels!

     Say thanks

      Birthdays and holidays are chances for us to thank people who love us. But it can be a special treat to

get a gift or a card on an ordinary day. Think of the people who make you happy and then come up with

a way to show them your care. Use your arts and craft supplies to create a special card. Or ask your

parents to help you make cookies as a gift for that special person. You will be delivering sunshine on a

rainy day!

1. According to the passage, these activities can happen on ______.

A. sunny days

B. rainy days

C. cloudy days

D. windy days

2. When working on the puppet show, children can ______.

A. train their own imagination

B. learn to perform shows on stage

C. know how to deal with others

D. find new ways of creating puppets

3. Which of the following words can be used to describe the kids' castle?

A. Boring

B. Hot

C. Quiet

D. Noisy

4. What can we learn from the passage?

A. You can pretend to be a doctor by trying on your parent's clothes.

B. You can only give a gift or a card to show your care on birthdays or holidays.

C. You can use your own dance dresses to dress up.

D. You can make some gifts to show your care for special persons.