问题 单项选择题

花儿为什么这样红最后要归功于人工选择。自然选择进程缓慢,需要经过很长时间才能显示它的作用,人工选择大大加快了它的进程,能够在较短的时间内取得显著成果。人工栽培的历史仅二三百年,却已有上千种形状、颜色不同的品种。这段话直接支持了


这样一种观点,即( )。

A.人工栽培的历史虽短,却成就非凡
B.自然选择没有人工选择好
C.人工选择能使花的颜色更红
D.人工选择加快了花的变化进程

答案

参考答案:D

解析:关键句为第二句,其说明的观点即人工选择加快了花的变化进程。

阅读理解

阅读理解。

     How the iron (熨斗) of tomorrow (the first Self Cleaning Iron) can change your lifestyle today?

     General Electric introduces the iron of tomorrow. The iron can clean itself inside where irons get dirty.

Because it cleans itself each and every time you empty it. How? With a push of a magic blue button.

     The magic blue button

     The first thing you'll notice that's different about this iron is the blue button on the side. It's marked "Self

Clean". Push this blue button, and you can wash out loose mineral deposits(沉淀物) that remain and block up

inside. Push this button, and you've made life a lot easier.

     Less chance of brown spots

     Sure, Self Cleaning Iron is going to cut down on brown spots (Those ugly spots that happen on nice,

cleanly pressed clothes.) because a Self Cleaning Iron becomes clean each time you press that magic blue

button.

      Steams better longer

     Common sense tells you that if you've got an iron that blocks less often it has to stay younger for a long

period of time. In other words, it steams better longer. That's another joy of owning General Electric's Self

Cleaning Iron.

     What does it mean to you

     Today you are doing so much more than just running a house and running after the kids. You're working.

 You're going to school. It's all part of you to be a better wife, a hotter mother, a better housemaker, we want

to. The new Self Cleaning Iron is another one of Home-Makers from General Electric.

      Lifestlye.

     We're with yours.

     GENERAL ELECTRIC

1. This passage is ______.

A. an introduction to General Electric

B. an operating instruction of Self Cleaning Iron

C. an advertisement of Self Cleaning Iron

D. a description of the change of lifestyle

2. This iron can clean itself by ______.

A. emptying itself

B. washing out mineral deposits

C. blocking up mineral deposits

D. giving off more steam

3. According to the passage, what is most likely to attract the customers?

A. It is made by General Electric.

B. The iron will not produce mineral deposits.

C. Their clothes will be washed at the same time.

D. There will be fewer brown spots on pressed clothes.

4. Self Cleaning Iron can help change your lifestyle because ______.

A. you can run your house better

B. you don't have to run after the kids

C. you can use it while you are working

D. we want you to stay at home

单项选择题