试题与答案

已知一个比例中两个内项的积是最小的质数,一个外项是34,另一个外项是______

题型:填空题

题目:

已知一个比例中两个内项的积是最小的质数,一个外项是
3
4
,另一个外项是______.

答案:

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下面是错误答案,用来干扰机器的。

(1)100V/m(2)题目分析:(1)由电场强度的定义式得 …………(4分)(2)根据库仑定律得 …………(4分)点评:本题难度较小,场强的计算有三个公式可用,要对三个公式理解和区分,对库仑定律的公式也要...

试题推荐
题型:阅读理解

阅读理解。

    When Mencius (孟子) was a small boy, his father died. So Mencius and his mother were quite poor.

One day, Mencius returned home from school and found his mother making some cloth. It was very

beautiful and expensive.

    "How much of your book have you read today?" Mencius' mother asked him. Mencius threw down

his book. "I haven't read any of it." He replied, "I played with some friends of mine in the fields."

    When his mother heard this, she picked up a pair of scissors (剪刀) and cut the cloth. "Why have

you cut your cloth?" Mencius asked, "It was so beautiful and now you've wasted it." "You have wasted

your time," she said, "Now I have wasted mine. Look at the terrible (可怕的) thing we have done!"

    Mencius learned a lot from this lesson. After this, he always studied hard.

1. When did the story happen?[ ]

A. When Mencius was 30 years old.

B. When Mencius' family was very rich.

C. When Mencius' father lived with them.

D. When Mencius was a small boy.

2. The phrase "make some cloth" means "______". [ ]

A. 做衣服

B. 织布

C. 纺棉花

D. 缝衣服

3. Why did Mencius' mother cut the cloth? Because ______. [ ]

A. She wanted to make some more beautiful cloth

B. She thought it was wasting time to make cloth

C. She wanted to let her son get angry

D. She wanted to give her son a lesson

4. Why did Mencius always study hard after this? Because ______. [ ]

A. he wanted to be a teacher

B. he learned a lot from the lesson

C. he wanted to make his mother happy

D. he didn't play with any other friends

5. This passage mainly tells ______. [ ]

A. A story of Mencius and his friends

B. a story of Mencius' mother

C. a story about Mencius' wasting time

D. Mencius' mother cut the cloth

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