[单选题] 用OTDR实施监测时，距离远则选择脉冲宽度应( ) -我要搜题网

[单选题]架空输电线路采用钳压法连接导线LGJ-95/20时，钳压管两端导线宜露出(____)mm。
A.5
B.20
C.50
D.100

[单选题]当脚手架基础下有设备基础、管沟时,( )。
A. 如果不采取加固措施,不应开挖
B. 可以开挖,否则施工进度跟不上
C. 可以开挖,不必采取加固措施
D. 开挖后,墓础可以暂时悬空

[判断题] 工长负责落实公司及车间的各项(安全管理) 规章制度,是本工段、班组的安全生产第一责任人。( )
A.正确
B.错误

[不定项选择题]共用题干第二篇

Few Facts about Lies

What exactly is a lie?Is it anything we say which we know is untrue?Or is it something more than that?For example,suppose a friend wants to borrow some money from you.You say"I wish I could help you but I'm short of money myself."In fact,you are not short of money but your friend is in the habit of not paying his debts and you don't want to hurt his feelings by reminding him of this. Is this really a lie?
Professor Jereald Jellison of the University of Southern California has made a scientific study of lying. According to him,women are better liars than men,particularly when telling a"white lie," such as when a woman at a party tells another woman that she likes her dress when she really thinks it looks awful.However,this is only one side of the story. Other researchers say that men are more likely tell more serious lies,such as making a promise which they have no intention of fulfilling. This is the kind of lie politicians and businessmen are supposed to be particularly skilled at:the lie from which the liar hopes to profit or gain in some way.
Research has also been done into the way people's behavior changes in a number of small,apparently unimportant ways when they lie.It has been found that if they are sitting down at the time, they tend to move about in their chairs more than usual.To the trained observer they are saying"I wish I were somewhere else now."They also tend to touch certain parts of the face more often,in particular the nose.One explanation of this may be that lying causes a slight increase in blood pressure.The tip of the nose is very sensitive to such changes and the increased pressure makes it itch （痒）.
Another gesture which gives liars away is what the writer Demond Morris in his book Manwatching calls"the mouth cover".He says there are several typical forms of this,such as covering part of the mouth with the fingers,touching the upper-lip or putting a finger of the hand at one side of the mouth.Such a gesture can be interpreted as an unconscious attempt on the part of the liar to stop himself or herself from lying.
Of course,such gestures as rubbing the nose or covering the mouth,or moving about in a chair cannot be taken as proof that the speaker is lying. They simply tend to occur more frequently in this situation. It is not one gesture alone that gives the liar away but a whole number of things,and,in particularly,the context in which the lie is told. People may rub their noses when they lie because________.
A.they suffer from high blood pressure at the time
B.the nose is the most sensitive part of the human body
C.the nose reveals the liar more easily than the other parts of the face
D.they do so in order to stop themselves from telling more lies

[单选题] 用OTDR实施监测时，距离远则选择脉冲宽度应( ) 。A.小B.大C.不变D.居中

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[单选题] 用OTDR实施监测时，距离远则选择脉冲宽度应( ) 。
A.小
B.大
C.不变
D.居中