引起大气运动的根本原因是()A、地区间冷热不均 B、海陆分布差异 C、空气的升降运动 D、

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问题:

引起大气运动的根本原因是()

A、地区间冷热不均

B、海陆分布差异

C、空气的升降运动

D、地转偏向力

考点:高中地理大气运动大气运动题库
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若已知某产品的故障的密度函数为f(t)=0.002e-0.002t,(单位:h)

平均故障时间为()。

A.500h

B.200h

C.2000h

D.5000h

题型:单项选择题
I grew up poor — living with six brothers, three sisters and my mother. We had little money, but plenty of love and   36  . I was happy and energetic. I understood that no matter how poor a person was, he could still   37   a dream.
My dream was   38  . By the time I was sixteen, I could throw a ninety-mile-per-hour baseball and   39   anything that moved on the field. I was also   40  : my high school coach was John, who not only   41   me, but also taught me how to believe in myself. He   42   me the difference between having a dream and showing conviction (信念). One particular incident with coach John changed my life forever.
A friend   43   me for a summer job. This meant a chance for money in my pocket — money for a new bike, new clothes and the   44   of savings for a house for my mother. Then I realized I would have to   45   up summer baseball to handle the work schedule, and that meant I would have to tell John I wouldn’t be playing.
When I told John, he was as   46   as I expected him to be. “You have your whole life to work,” he said, “Your   47   days are limited. You can’t afford to waste them.” I stood before him with my head   48  , trying to think of the words that would   49   to him why my dream of buying my mom a house and having money in my pocket was worth facing his   50   in me.
“Well,” he asked, “is $3.5 an hour the   51   of a dream?”
That simple question made   52   to me the difference between   53   something right now and having a goal. I devoted myself in sports that summer and   54   the year I was chosen by the Pittsburgh Pirates to play baseball, and   55   a $ 20,000 contract(合同). Later, I bought my mother the house of my dream!
小题1:
A.attentionB.time C.patienceD.fashion
小题2:
A.bring B.continueC.make D.afford
小题3:
A.athletics B.music C.business D.money
小题4:
A.kick B.play C.hitD.pass
小题5:
A.right B.popular C.lucky D.confident
小题6:
A.believed in B.relied on C.called on D.dealt with
小题7:
A.gave B.taught C.brought D.asked
小题8:
A.called B.advised C.applied D.recommended
小题9:
A.aim B.idea C.start D.purpose
小题10:
A.keep B.end C.give D.pick
小题11:
A.happy B.madC.frightened D.excited
小题12:
A.living B.working C.playing D.dreaming
小题13:
A.moving B.hanging C.shaking D.nodding
小题14:
A.express B.announce C.apologiseD.explain
小题15:
A.belief B.pride C.fear D.disappointment
小题16:
A.lengthB.priceC.powerD.spirit
小题17:
A.clear B.direct C.straight D.attractive
小题18:
A.wanting B.changing C.dreaming D.enjoying
小题19:
A.by B.for C.beyond D.within
小题20:
A.paid B.found C.offered D.presented
题型:单项选择题

若用8位机器码表示十进制数-101,则原码表示的形式为();补码表示的形式为()。

补码表示的形式为()

A.11100101 

B.10011011

C.11010101

D.11100111

题型:单项选择题

急冷油过滤器后的小过滤器有何作用?

题型:单项选择题

接力切换最主要的特点是要开环预同步过程。

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