计算：（1）14+（-11）+7（2）-2×9-8×（-2）（3）-23×（-2

发布时间：2017-04-17 06:34 │ 来源：www.tikuol.com

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问题：

计算：
（1）14+（-11）+7
（2）-2×9-8×（-2）
（3）-2³×（-

）²-7²
（4）30÷（

）

考点：实数的运算

题型：解答题

下列属于天气的说法是（　　）

A．明天大风降温

B．昆明四季如春

C．镇江夏季高温多雨

D．极地全年严寒

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如图所示，半圆形光滑槽固定在地面上，匀强磁场与槽面垂直，将质量为m的带电小球自槽口A处由静止释放，小球到达槽最低点C处时，恰好对槽无压力.则小球在以后的运动过程中对C的最大压力为( )

A．0

B．2mg

C．4mg

D．6mg

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完形填空。

     It was an afternoon in the winter. Some friends and I were talking at a restaurant. We talked and
talked and soon swimming became the  1 . Suddenly I hit upon an idea. "Wouldn't it be   2 if we went
swimming? Others went swimming in winter, and   3 couldn't we? Besides, we could be   4 if we did.
" I told them about this and they all said it was a good idea indeed.
     Early in the morning, three days  5 , we four were standing at the bus stop, with bags in our hands,
  6 for a bus to take us to the  7 . The sky was clear, the sun was shining, but all the same, it was very
cold,   8 our heavy overcoats were not enough to keep us   9 . We all felt that we should go back, but
no one wanted to  10   .
     We soon reached the sands. There was nobody there, but we were not to be discouraged.   11 we
were proud that we were the   12 ones that dared to challenge the weather. Besides, the sun could
keep us warm. So we   13 ourselves quickly.
     But things were not going to be so nice as we thought. The sea wind was blowing, we felt   14 cold
and we shook from head to feet. At last we decided to   15   the sea water. We put our feet in first, only
to take them back  16 . The water was unbelievably cold.    17   I suggested that we should all jump in
at the same time. We all went back ten steps. I gave the order and we all rushed forward. We jumped.
That feeling I had when I was in the water I shall never 18 . I was up and rushed again to the seaside.
So   19 my friends. We put on our clothes as quickly as possible and went home.
     We four did not go to school the next three days, for we all   20 a bad cold. We missed the lessons,
but we had this unforgettable experience.

( )1. A. object
( )2. A. interesting
( )3. A. what
( )4. A. worse
( )5. A. later
( )6. A. asking
( )7. A. swimming pool
( )8. A. only
( )9. A. cold
( )10. A. speak out
( )11. A. For
( )12. A. only
( )13. A. helped
( )14. A. such
( )15. A. go down
( )16. A. carefully
( )17. A. Last
( )18. A. remember
( )19. A. did
( )20. A. became

B. topic
B. lucky
B. how
B. ill
B. past
B. meeting
B. sands
B. though
B. warm
B. talk about
B. Instead
B. lucky
B. enjoyed
B. a little
B. go into
B. quickly
B. Next
B. forget
B. do
B. felt

C. opinion
C. happy
C. that
C. stronger
C. since
C. waiting
C. lake
C. even
C. hot
C. shout at
C. Sometimes
C. younger
C. dressed
C. very
C. jump into
C. bravely
C. When
C. believe
C. were
C. turned

D. center
D. surprising
D. why
D. better
D. before
D. looking
D. river
D. since
D. cool
D. think over
D. Unless
D. happy
D. changed
D. a bit
D. take off
D. finally
D. Then
D. tell
D. had
D. caught

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病历摘要：患者男性，65岁，既往有高血压病史10余年。因剧烈胸痛5小时入院，伴出冷汗，呕吐2次。查体：血压90/60mmHg，四肢湿冷。心率45次/分，可闻及S4，胸骨左缘第3肋间可闻及3/6级舒张期哈气样杂音。此时的急诊处理为（）。

A.硝酸甘油

B.β阻滞剂

C.吗啡；急诊冠脉造影；溶栓治疗

D.洋地黄

E.胃复安

F.肾功能检查

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交换机上的ACL 不能实现的功能是（56），交换机上的RADIUS 不能实现的功能是（57）。

空白处（57）应选择（）

A．用户名认证

B．用户密码认证

C．用户接入权限认证

D．流量控制

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