问题 选择题

如图所示的下列用品中,通常情况下属于导体的是(  )

A.

    塑料直尺

B.

  陶瓷瓶

C.

      钢制刀具

D.

     塑料救生圈

答案

A、塑料直尺是塑料制品,所以塑料尺是绝缘体.不符合题意.

B、陶瓷瓶是陶瓷制品,所以陶瓷瓶是陶瓷制品.不符合题意.

C、钢制刀具是金属制品,所以钢制刀具是导体.符合题意.

D、塑料救生圈是塑料制品,所以塑料救生圈是绝缘体.不符合题意.

故选C.

单项选择题
阅读理解

阅读理解。

    Years ago, when I started looking for my first job, a wise man advised, "Barbara, be

enthusiastic! Enthusiasm will take you further than any amount of experience." How right

they were!

   "Nothing great was ever achieved without enthusiasm." wrote Ralph Waldo Emerson. It is

the paste that helps you hang on there when the going tough. It is the inner voice that

whispers, "I can do it!" when others shout, "No, you can't!" It took years and years for

the early work of Barara McClintock, a geneticist who won the 1983 Nobel Prize in medicine,

to be generally accepted. Yet she didn't stop working on her experiments. Work was such a

deep pleasure for her that she never thought of stopping.

   We are all born with wide-eyed, enthusiastic wonder and it is this childlike wonder

that gives enthusiastic people such youthful air, whatever their age was. At 90, cellist

Palblo Cassls would start his day by playing Bach. As the music flowed through his fingers

his stooped shoulders would strengthen and joy would reappear in his eyes. As author and

poet Samuei Ulman once wrote, "Years wrinkle (使起皱纹) the skin,but to give up enthusiasm

wrinkles the soul."

   Enthusiastic people also love what they do, regardless of money or power. Patricia

Mellrath, retired director of the Missouri Repertory Theatre in Kansas City, was once asked

where she got her enthusiasm. She replied, "My father, a lawyer long ago told me, I never

made a dime until I stopped working for money."

   If we cannot do what we love as a full-time career, we can as a hobby. Elizabeth Layton

was 68 before she began to draw. This activity ended periods of depression that had trouble

d her for at least 30 years,and the quality of her led one critic (批评家)to say, "I'd like

to call Layton a genius."

   We can't afford to waste tears on "might-have-been". We need to turn the tears into

sweat as we go after "what-can-be". We need to live each moment whole-heartedly, which all

our senses-including pleasure in the sweet smell of a back-yard garden, the simple picture

of a six-year-old, the beauty of a rainbow.

1. What is the Chinese for "enthusiasm"? [ ]

A. 热情

B. 色彩

C. 惰性

D. 金钱

2. The author mentions cellist Pablo Casals in the third paragraph to show that _____.[ ]

A. music can arouse people's enthusiasm

B. enthusiasm can give people energy needed to succeed

C. enthusiasm can keep people feel young

D. enthusiasm can keep people healthy

3. How many examples are given in the passage to show the importance of enthusiasm? [ ]

A. Three

B. Two

C. Four

D. Five

4. The author mainly wants to say that _____.[ ]

A. enthusiasm people never get old

B. enthusiasm can make you succeed and enjoy life

C. enthusiasm is more important than experience

D. enthusiasm can give people more success and fame.