西伯利亚不利于农业发展的主要原因是[ ] A、年降水量太少 B、常年气温过低 C

发布时间：2017-04-21 04:44 │ 来源：www.tikuol.com

题型：选择题

问题：

西伯利亚不利于农业发展的主要原因是[ ]

A、年降水量太少

B、常年气温过低

C、森林面积过大

D、灌溉水源不足

考点：俄罗斯

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李先生忘记了自己电脑的开机密码，但记得密码是由两个3，一个6，一个9组成的四位数，于是，他用

这四个数字随意排成一个四位数输入电脑尝试、那么他打开电脑最多尝试的次数为（　　）

A．64

B．18

C．12

D．6

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有以下程序#include #include int fun(int n){ int *p；p=(int*)malloc(sizeof(int))；*p=n； return*p；}main(){ int a：a=fun(10)；printf("%d\n"，a+fun(10))；}程序的运行结果是

A．0

B．10

C．20

D．出错

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题型：选择题

完形填空。

     Here's a new warning from health experts: Sitting is deadly. Scientists are increasingly warning that sitting
for prolonged periods-even if you also exercise regularly-could be    1   for your health. And it doesn't matter
where the sitting takes place-at the office, at school, in the car or before a computer or TV-just the overall
number of hours it    2   .
     Research is preliminary, but several studies    3    people who spend most of their days sitting are more likely
to be fat, have a heart attack or even die.
     In an editorial    4   this week in the British Journal of Sports Medicine, Elin Ekblom-Bak of the Swedish
School of Sport and Health Sciences suggested that authorities rethink how they define    5    activity to highlight
the dangers of sitting.
     While health officials have issued guidelines    6   minimum amounts of physical activity, they haven't
suggested people try to limit how much time they spend in a seated    7   .
     "After four hours of sitting, the body starts to send    8    signals," Ekblom-Bak said. She explained that genes
regulating the amount of glucose and fat in the    9    start to shut down.
     Even for people who   10 , spending long stretches of time sitting at a desk is still harmful. Tim Armstrong,
a physical activity expert at the World Health Organization, said people who exercise every day-  11   still spend
a lot of time sitting-might get more benefit if that exercise were spread across the day,   12   in a single bout.
     That wasn't   13   news for Aytekin Can, 31, who works at a London financial company, and spends most
of his days sitting   14   a computer. Several evenings a week, Can also teaches jiu jitsu, a Japanese martial art
  15    wrestling, and also does Thai boxing.
    "I'm sure there are some detrimental   16   of staying still for too long, but I hope that being   17   when I can
helps," he said. "I wouldn't want to think the sitting could be   18   dangerous."
     Still, in a study published last year that tracked more than 17,000 Canadians for about a dozen years,
researchers found people who sat   19   had a higher death risk, independently of whether or not they exercised.
     Figures from a US survey in 2003-2004 found Americans spend more than half their time sitting, from
working at their desks to sitting in cars.
     Experts said more research is needed to   20   just how much sitting is dangerous, and what might be
possible to offset those effects.

( )1.A.bad
( )2.A.does
( )3.A.advise
( )4.A.thrown
( )5.A.biological
( )6.A.commending
( )7.A.stand
( )8.A.harmful
( )9.A.head
( )10.A.sleep
( )11.A.and
( )12.A.rather than
( )13.A.bad
( )14.A.behind
( )15.A.referring
( )16.A.effects
( )17.A.inactive
( )18.A.such
( )19.A.less
( )20.A.leave out

B.good
B.occurs
B.talk
B.caught
B.physical
B.mending
B.state
B.careful
B.arm
B.rest
B.so
B.other than
B.harmful
B.back
B.involving
B.prefects
B.active
B.little
B.fewer
B.bring out

C.mean
C.matches
C.suggest
C.seen
C.psychological
C.recommending
C.post
C.wonderful
C.body
C.walk
C.but
C.more than
C.disadvantage
C.in front of
C.taking
C.affects
C.interactive
C.lot
C.more
C.hold out

D.dead
D.dies
D.say
D.published
D.logical
D.communicating
D.position
D.skillful
D.foot
D.exercise
D.then
D.less than
D.welcome
D.forward
D.bringing
D.offers
D.positive
D.that
D.further
D.figure out

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单突触反射

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信用证、非信用证结汇的应在报检单上注明结汇方式。 ( )

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