采用专用通信线路时,通信的三个阶段顺序为() A.传送数据→建立数据链路→传输结束撤

题型:单项选择题

问题:

采用专用通信线路时,通信的三个阶段顺序为()

A.传送数据→建立数据链路→传输结束撤消链路

B.建立数据链路→传输结束撤消链路→传送数据

C.建立数据链路→传送数据→传输结束撤消链路

D.传输结束撤消链路→传送数据→建立数据链路

考点:计算机网络管理员计算机网络管理员(高级)计算机网络管理员(高级)题库
题型:单项选择题

阅读下在短文,从短文后各题的A、B、C、D四个选项中,选出适合填入对应空白处的最佳选项,并在答题卡上将该选项涂黑。

A woman id her sixties lived alone in her little cottage with a pear tree at her door. She spent all her time taking care of the tree. But the children nearby drover her    21     by making fun of her. They would climb her tree and then run away with pears,     22  “Aunty Misery” at her.

One evening, a passer by asked to    23    for the night. Seeing that he had an   24  Face, she let him in and gave him a nice    25  . The next morning the stranger, actually a sorcerer (巫师), thanked her by granting (允准) her   26    that anyone who climbed up her tree 27  not be able to come back down until she   28 it.

When the children came back to steal her   29  , she had them stuck on the tree. They had to beg her

long   30  she gave the tree permission to let  31   go. Aunty Misery was free from the   32  at last.

One day another man    33   her door. This one did not look trustworthy to her,   34  she asked who he was . “I am Death, I’ve come to take you   35   me.” said he.

Thinking fast Aunty Misery said, “Fine, but I’d like to  36   some pears from my dear tree to remember the 37          

it brought to me in this life. But I am too    38  to climb high to get the best fruit. Will you be so   39   as to do it for me?” With a deep sigh, Mr. Death climbed up the tree   40  and was immediately stuck to it. No matter how much he warned or begged, Aunty Misery would not allow the tree to let Death go.

21.  A. hopeless    B. painful   C. dull   D. crazy

22.  A. calling     B. shouting   C. announcing       D. whispering

23.  A. stay       B. live       C. hide             D. lie

24.  A. interesting B. honest    C. anxious          D. angry

25.  A. gift       B. kiss      C. treat             D. smile

26.  A. suggestion  B. demand     C. permission       D. wish

27.  A. could      B. should     C. might            D. must

28.  A. permitted   B. promised   C. answered         D. declared

29.  A. branch    B. food       C. tree             D. fruit

30.  A. after      B. while      C. since            D. before

31.  A. it        B. them       C. him              D. her

32.  A. trick     B. question    C. trouble          D. difficulty

33.  A. stepped into   B. left for C. stopped at      D. walked around

34.  A. so       B. but          C. although        D. because

35.  A. with     B. off          C. upon            D. for

36.  A. choose    B. pick         C. shake           D. hit

37.  A. honor     B. pleasure      C. hope            D. excitement

38.  A. light     B. short        C. old             D. thin

39.  A. proud     B. kind         C. fine            D. smart

40.  A. disappointedly       B. cheerfully      C. unwillingly     D. eagerly

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子宫颈癌最早出现的症状是( )

A.尿频尿急
B.接触性出血
C.进行性下肢肿痛
D.大量米汤样恶臭白带
E.绝经后长期 * * 流血

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A.秒

B.分钟

C.小时

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B.30°/小时

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