对于逆变侧单相故障导致的换相失败,换相失败的持续时间一般不超过()。A.100ms

题型:单项选择题

问题:

对于逆变侧单相故障导致的换相失败,换相失败的持续时间一般不超过()。

A.100ms

B.200ms

C.20ms

D.10ms

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以下哪一项不是激素治疗可能出现的并发症()

A.高血压

B.糖尿病

C.高钾血症

D.低钙血症

E.库欣综合征

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“绷紧”是用左手手指把皮肤紧绷,其作用是()。

A.固定住面部皮肤

B.配合剃刀的修剃

C.把面部皱纹拉平

D.剃刀修剃时平滑

题型:单项选择题

阅读理解

     The days of elderly women doing nothing but cooking huge meals on holidays are gone. Enter the

Red Hat Society -a group holding the belief that old ladies should have fun.

     "My grandmothers didn't do anything but keep house and serve everybody. They were programmed

to do that," said Emily Cornette, head of a chapter of the 7-year-old Red Hat Society.

     While men have long spent their time fishing and playing golf, women have sometimes seemed to

become unnoticed as they age. But the generation now turning 50 is the baby boomers, and the same

people who refused their parents' way of being young are now trying a new way of growing old.

     If you take into consideration feminism(女权主义), a bit of spare money, and better health for most

elderly, the Red Hat Society looks almost inevitable(必然的). In this society, women over 50 wear red

hats and purple clothes, while the women under 50 wear pink hats and light purple clothing.

     "The organization took the idea from a poem by Jenny Joseph that begins: "When I am an old woman,

I shall wear purple. With a red hat which doesn't go," said Ellen Cooper, who founded the Red Hat

Society in 1998. When the ladies started to wear the red hats, they attracted lots of attention.

    "The point of this is that we need a rest from always doing something for someone else," Cooper said. "Women feel so ashamed and sorry when they do something for themselves." This is why chapters are

discouraged from raising money or doing anything useful. "We're a ladies' play group. It couldn't be more

simple," added Cooper's assistant Joe Heywood.

1. The underlined word "chapter" in paragraph 2 means __________.

A. one branch of an organization          

B. a written agreement of a club

C. one part of a collection of poems      

D. a period in a society's history of the baby boomers

2. The "baby boomers" are a group of people who       

A. have gradually become more noticeable                                

B. tried living a different life from their parents when they were young

C. are worried about getting old too quickly  

D. are enjoying a good life with plenty of money to spend

3. We can infer from the text that          .

A.  members of the Red Hat Society are interested in raising money for social work

B.  members of the Red Hat Society are programmers who can plan well for their future

C. members of the Red Hat Society believers in equality between men and women

D.  members of the Red Hat Society are good at cooking big meals and taking care of others

4. Who set up the Red Hat Society ?

A. Emily Cornette .

B. Jenny Joseph .   

C. Joe Heywood .

D. Ellen Cooper .  

5. Women join the Red Hat Society because          .

A. they want to earn much money.          

B. they would like to appear more attractive

C. they would like to have fun and live for themselves

D. they want to be more like their parents

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电气化铁路的输电线常用图所示的方式悬挂在钢缆上.钢缆的A端固定在电杆上,B端连接在滑轮组上.滑轮组由a、b、c三个滑轮构成,配重P由多个混凝土圆盘悬挂在一起组成,配重的总重为G,若不计摩擦和滑轮的重量,则以下说法中正确的是(  )

A.a为动滑轮,B端钢缆受到滑轮组的拉力大小约为3G

B.a为动滑轮,B端钢缆受到滑轮组的拉力大小约为G

C.a、c为动滑轮,B端钢缆受到滑轮组的拉力大小约为3G

D.a、c为动滑轮,B端钢缆受到滑轮组的拉力大小约为G

题型:单项选择题

落地式调压柜应单独设置在牢固的基础上,则柜底距地坪高度宜为( )。

A.0.2 m
B.0.1 m
C.0.4 m
D.0.3 m

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