GB.7588-2003要求,在用客梯层门关闭后,门扇与门框或门扇之间的间隙不得大于

题型:单项选择题

问题:

GB.7588-2003要求,在用客梯层门关闭后,门扇与门框或门扇之间的间隙不得大于()mm.

A.6

B.8

C.10

D.30

考点:电梯操作证考试电梯维修电梯维修题库
题型:单项选择题

一个优秀的电视广告,展现在观众面前的时间的计算单位是( )

A.秒

B.十秒

C.分

D.十分

题型:单项选择题

温度计的测量原理是利用 ______的性质.一杯约70℃的热水,______用体温计测量其温度.(选填“能”或“不能”).

题型:单项选择题

阅读理解.

     Impatient drivers, pushy people on the subway, kids shouting into their mobile phones...

we see these unpleasant incidents almost every day. This is why Canadian filmmaker John

Curtin's new documentary, To Hell With Manners! The Decline of Civility ,couldn't be

more timely.

     He puts these impolite behaviors under a microscope in an attempt to explain why we

seem to have become so much ruder in recent years.

     Curtin travels to New York and London to record rude and sometimes not-so-rude

behaviors. " I'm not actually saying that everyone is impolite. I would say we are becoming

less kind to each other simply because we're not paying attention to one another, " he said.

     Cutin attributes people's indifference (冷漠) largely to the modern technology we have:

iPods, cellphones and stuff like that.

     Montreal Gazette columnist Josh Freed, who talks in the film, agrees withCurtin."

We've become less human as a result of these technological advances and by the fact

that,so often,we're now surrounded by strangers, " Freed said.

      Curtin wanted at all costs to make sure his film was not full of older people talking

about how impolite young people have become. Instead, _________ "We just live in a

very rushed, stressed-out society and it's very easy to feel you're under pressure and

you've got to take care of yourself. So we imagine ourselves in some kind of Darwinian

struggle where you have got to take care of number one," Curtin said.

1. Why does the author think Curtin's new documentary couldn't be more timely?

( Please answer within 20 words)

______________________________________________________________

2. Which sentence in the passage is the closest in meaning to the following one?

Curtin examines these unpleasant incidents carefully, trying to make clear what leads

to our worsening manners.

_______________________________________________________________

3. According to Curtin, what results in people's indifference? ( Please answer

within 15 words)

________________________________________________________________

4. Translate the underlined sentence in Paragraph 5 into Chinese.

_________________________________________________________________

5. Fill in the blank in the last paragraph with proper words.( Please answer within

5 words)

_________________________________________________________________

题型:单项选择题

快速排序算法在排序过程中,在待排序数组中确定一个元素为基准元素,根据基准元素把待排序数组划分成两个部分,前面一部分元素值小于等于基准元素,而后面一部分元素值大于基准元素。然后再分别对前后两个部分进一步进行划分。根据上述描述,快速排序算法采用了(1)算法设计策略。已知确定基准元素操作的时间复杂度为Θ(n),则快速排序算法的最好和最坏情况下的时间复杂度为(2)。

空白(2)处应选择()

A.Θ(n)和Θ(nlgn) 

B.Θ(n)和Θ(n2) 

C.Θ(nlgn)和Θ(nlgn) 

D.Θ(nlgn)和Θ(n2

题型:单项选择题

正常的止血机制必须依赖()

A.血管收缩

B.血小板反应

C.凝血系统

D.抗凝血系统

E.纤维蛋白溶解系统

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