按照线路规程的规定,避雷线的设计安全系数不应小于() A.2.0 B.2.5 C.3

题型:单项选择题

问题:

按照线路规程的规定,避雷线的设计安全系数不应小于()

A.2.0

B.2.5

C.3.0

D.3.5

考点:国家电网农网配电生产技能考试架空配电线路架空配电线路题库
题型:单项选择题

阅读理解。

     It's only $79.99! How many times have you heard those words on TV or read them in a newspaper

ad? The word "'only" is supposed to make you think that this is a great price for the product.

     But think about this. How long does it take you to earn $79.99? What do you have to do to get that

money? The little thing that's only $79.99 is worth (价值) almost 12 hours of your work! And if you are

making less than this, how long will it take to earn that much money?

     So as you stand in a store, telling yourself that you have to buy something, think about how long you

must work to earn the money to pay for it. Is that $85 T-shirt really worth the time to earn $85? You

could probably find a similar shirt at another store for under $35, right?

     Even if your parents are still buying your clothes, someone has to work for the money. If you spend

money on one thing, you don't have money to spend on anything else.So if you spend $85 on those jeans, you cannot put it in the bank, and you cannot go snowboarding(单板滑雪)or to the movies with friends

because you don't have the money to go.

1. Saying that it's "only $ 79.99" may make you think that it ____

A. is expensive    

B. is important      

C. is cheap       

 D. cannot be accepted

2. If you earn $10 an hour, how long must you work to buy an $85 T-shirt?

A. More than 8 hours.                

B. More than 12 hours.

C. Less than 8 hours.                  

D. Less than 7 hours.

3. Which is NOT mentioned in the passage?

A. The newspaper ad may use some words to promote sales. (促销)

B. The $ 79.99 T-shirt doesn't have good quality.

C. The T-shirt may make you spend the money you planned to use for some other things

D. You can find a similar T-shirt at another store for a lower price.

4. From the passage we know that ______.

A. the T-shirt isn't worth buying

B. the T-shirt is too expensive

C. we shouldn't believe the newspaper ad

D. before we buy something, we should think about what it is really worth

5. We can probably find the passage in a (n) ______.

A. advertisement  

B. Youth Newspaper

C. Year-book      

D. story-book

题型:单项选择题

由于刹车,汽车以10m/s的初速度开始做匀减速直线运动,若加速度大小为2m/s2,则汽车在前6s内的位移(  )

A.24m

B.25m

C.36m

D.42m

题型:单项选择题

小柴胡汤证“嘿嘿不欲饮食”的产生机制是()

A.血弱气尽,腠理开

B.藏府相连,邪高痛下

C.邪气与正气相搏,结于胁下

D.正邪分争于半表半里

E.胆失疏泄,克犯脾胃

题型:单项选择题

配制1L物质的量浓度为0.1mol/L的Na2SO4溶液,需要Na2SO4的质量为

A.14.2g

B.142g

C.7.1g

D.71g

题型:单项选择题

漏睛疮最直接的病因是()

A.素有椒疮

B.素有漏睛

C.素有白涩症

D.素有时复症

E.素有流泪症

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