类风湿关节炎发病中起主要作用的细胞为A.CD1+细胞 B.CD4+细胞 C.CD8+

题型:单项选择题

问题:

类风湿关节炎发病中起主要作用的细胞为

A.CD1+细胞

B.CD4+细胞

C.CD8+细胞

D.B淋巴结细胞

E.巨噬细胞

考点:护理正副高结缔组织病和风湿病病人的护理结缔组织病和风湿病病人的护理5
题型:单项选择题

American society is not nap (午睡)friendly . In fact , says David Dings , sleep specialist at the University of Pennsylvania School of Medicine , “There’s even a prohibition (禁止) against admitting we need sleep”. Nobody wants to be caught napping or found asleep at work . To quote a proverb : “Some sleep five hours , nature requires seven , laziness nine and wickedness(淘气的) eleven.”

The way not to fall asleep at work is to take naps when you need them . “We have to totally change our attitude toward napping ,” says Dr. William Dement of Stanford University , the godfather of sleep research .

Last year a national commission led by Dement identified(发现) an “American sleep debt” which one member said was as important as the national debt . The commission was concerned about the dangers of sleepiness : people causing industrial accidents or falling asleep while driving . This may be why we have a new sleep policy in the White House . According to recent reports , President Clinton is trying to take a half---hour snooze (瞌睡) every afternoon .

About 60 percent of American adults nap when given the opportunity . We seem to have “a mid afternoon quiet phase ,” also called “a secondary sleep gate .” Sleeping 15 minutes to two hours in the early afternoon can reduce stress and make us refreshed . Clearly , we were born to nap .

We superstars of snooze don’t nap to replace lost shut--eye or to prepare for a night shift . Rather , we “snack” on sleep ,whenever , wherever and at whatever time we feel like it . I myself have napped in buses , cars , planes and on boats ; on floors and beds ;and in libraries ,  offices and museums .

小题1:The research done by the Dement Commission shows that Americans     .

A.don’t like to take naps

B.are terribly worried about their national debt

C.think that lack of enough sleep causes many accidents

D.have caused many industrial and traffic accidents小题2:The purpose of this article is to     .

  1. warn us of the wickedness of napping 
B. explain the danger of sleepiness

C. discuss the side effects of napping

D. convince the reader of the necessity of napping

小题3:The “American sleep debt”(Line 1 , Para .3) is the result of      .

  1. the traditional misconception the Americans have about sleep
  2. the new sleep policy of the Clinton Administration
  3. the rapid development of American industry
  4. the Americans’ worry about the danger of sleepiness
小题4:The second sentence of the last paragraph tells us that it is      .

  1. preferable to have a sound sleep before a night shift
  2. good practice to eat something light before we go to bed
  3. essential (基本的) to make up for lost sleep
  4. natural to take a nap whenever we feel the need for it

题型:单项选择题

用于把保险与投保人之间的保险经济关系用法律的形式固定下来,并且依靠这种法律形式约束双方履行各自的权利与义务,这种法律形式是( )。

A.保险合同
B.投保书
C.精算报告
D.保险代理合同

题型:单项选择题

打开考生文件夹下的演示文稿yswg.ppt,按下列要求完成对此文稿的修饰并保存:

将第一张幻灯片版面改变为“剪贴画与文本”,然后把剪贴画部分动画效果设置为“棋盘式”、“横向”。

题型:单项选择题

血管型急性排斥反应主要是:()

A.细胞介导的免疫反应

B.抗体介导的免疫反应

C.以单个细胞浸润为主要表现

D.血管内常见血栓形成

题型:单项选择题

以下哪个市场有询价和点击成交两种行情窗口?()

A、现券买卖

B、远期利率协议

C、资产支持证券

D、利率互换

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