验电器的工作原理是______.

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问题:

验电器的工作原理是______.

考点:电荷间的相互作用
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日本汽车在进入美国市场时,正是汽油价格上涨时期,日本汽车着重树立其省油节能的形象,取得了较好的效果,这种产品定位策略属于( )

A.按产品特色定位

B.按产品能带给顾客的利益定位

C.按使用者定位

D.按竞争者定位

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阅读理解。

   If you are a TV addict, you can't have missed the popular sitcom(情景喜剧) Home With Kids. The

lead characters, 17-year-old Xiao Xue and 14-year-old Liu Xing can remind us of our own behavior or

our classmates. We love the two teenagers, but are they good students? And what makes a good student?

"Being a student is a kind of occupation, so a good student should have good grades. Based on their

school reports, clever and diligent, Xiao Xue is a much better student than her brother, Liu Xing," says

Wu Hao, 16, Chifeng in Inner Mongolia. "The boy should work harder at studying since our duty as

students is to study well."

   It is generally accepted that getting good scores is crucial for a student. So to some, being a good

student means ranking high in your class or even your school. However, Wu also admits that a student's

personality is more important in being a role model student.

   "Honesty and kindness make you admirable. But Xiao Xue can be selfish, dishonest and arrogant,

which make others feel uncomfortable to be around her. So she has a lot yet to improve on," Wu said.

Many teenagers do not think it is fair to judge students by their grades. Take Liu Xing for example. He is

bright, good at computers and does everything else well like any other 14-year-old except studying.

  "He is smart, humorous and always has fancy ideas which makes him popular. I guess he could be an

excellent student if he attended school in the United States, where high grades are not so important and

creativity is hailed," says Jia Xiaoxu, 17, Hefei, Anhui.

    From the US hit movie High School Musical, Jia discovers her role model.

  "Gabriella in the movie is an ideal student. She is ranked top but is not seen as a bookworm. She is

sweet and sociable. Most importantly, Gabriella is always 'hungry' to try new things and actively

participates in different kinds of activities," she said.

1. What is the passage mainly about?

A. Two lovely middle school students.

B. A discussion about what makes a good student.

C. How to get high rank in study.    

D. Study and personality.

2. Which statement is NOT true according to Wu Hao?

A. A good grade is the most important for a good student.

B. A student's personality is more important for a role model student.

C. Xiao Xue still has some shortcomings which need to be improved.

D. Xiao Xue is much better in study than her brother Liu Xing.

3. Which of the following is NOT the advantage of Liu Xing according to the passage?

A. He is smart and humorous.      

B. He gets on well with Xiao Xue.

C. He does everything well except study.

D. He is good at computer and creative.

4. What can we learn from the last paragraph?

A. To be good students, we should be eager to learn and take part in different activities.

B. To be good students, we should work hard.

C. To be good students, we should not be addicted to books.

D. To be good students, we should only concern about social issues

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以下不属于开放性喉外伤的是:()

A.喉部切割伤

B.自缢

C.枪伤

D.刀伤

E.喉软管损伤

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董仲舒的新儒学是熔多种学说为一炉的,这些学说是()()()()。

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画出i=Imsin(ωt+)的波形图。

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