问题 选择题

下列有关说法中,正确的是

A.凡是含有碳元素的化合物都是有机化合物

B.油脂在人体中发生水解的产物是氨基酸

C.蛋白质主要由C、H、O、N四种元素组成

D.糖类物质都有甜味

答案

答案:C

A不正确,例如碳酸盐等是无机物。油脂的水解产物是甘油和高级脂肪酸,B不正确。糖类不一定都有甜味,所以正确的答案是C。

阅读理解

Have you ever stayed in a hotel ? Most Chinese hotels often provide guests with things like disposable(一次性的) toothbrushes , toothpaste , shampoo, and slippers. Many guests like the idea because they don’t have to bring their own . But , if you travel to Beijing , remember to bring your own things. Starting from now on , some hotels in Beijing will no longer provide guests with these disposables. They want to ask people to use less disposable things.

Many disposable things are made of plastic. People throw them away after only using them once. It is a waste of natural resources and is very bad for the environment . Do you know , one Chinese person makes as much as 400Kg of waste a year! Most of that waste comes from disposable things. In Beijing , people throw away about 19,000 tons of plastic bags and 1,320 tons of plastic lunch bowls every year! Plastic can take between 100 and 400 years to break down. So the less plastic we throw out, the better. So, wherever you travel , bring your own things and use them again and again .

Back at home and school, you can also do something to make our world a better place .Try to do these things in your daily life: Use cloth shopping bags , not plastic ones. After using a plastic bag , wash it out and let it dry. Then you can use it over and over again. Do not use paper cups. At your school canteen(食堂), use your own bowl and chopsticks instead of disposable ones.

小题1:Why do many hotels provide guests with some disposable things ?

A.Let their guests be convenient during their travelling .

B.Hope their guests use less disposable things.

C.Wish their guests to save money.

D.Want their guests to use more disposable things .小题2:From the passage we learn that some Beijing hotels will no longer provide guests with __________________.

A.cheap food and drink

B.disposable things

C.good service

D.free TV programs小题3:Which of the following is NOT true according to the passage ?

A.Many disposable things are made of plastic.

B.Throwing disposable things away is a waste of natural resources .

C.Plastic is very bad for the environment .

D.Plastic can be broken down easily.小题4:What can we do to make our world a better place at home and school ?

A.Use shopping bags made of plastic

B.Use disposable plates , bowls and chopsticks .

C.Do not throw away paper cups.

D.Do not forget to reuse daily necessities (必需品).小题5:We can learn from the passage that _________________________________.

A.people don't like disposable things at all.

B.we can't use paper or plastic bowls at school

C.We should use less plastic things and protect our environment

D.hotels won’t provide disposable things because they want to save money

单项选择题 案例分析题