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【判断题】
室内采用临时高压消防给水系统时，应设置高位消防水箱。
A.
正确
B.
错误
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【单选题】如图所示,设s 1 、s 2 为两相干光源并且初相位相同,发出波长为 的单色光,分别通过r 1 和r 2 的路径到达P点,r 2 的路径中有一块折射率为n厚度为d的介质。己知s 1 P = s 2 P = r,则这两条光的几何路程差 ,光程差 和相位差 分别为
A.
, ,
B.
, ,
C.
, 0,
D.
, ,
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【简答题】“凹肚脐(肚脐疤)”
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【单选题】如图所示，设S1、S2为两相干光源发出波长为l的单色光，分别通过两种介质(折射率分别为n1和n2，且n1>n2)射到介质的分界面上的P点，己知S1P =S2P= r，则这两条光的几何路程Dr, 光程差d 和相位差Dj 分别为 [ ]【图片】
A.
D r = 0 , d =0 , D j = 0
B.
D r = ( n 1 － n 2 ) r , d =( n 1 － n 2 ) r , D j =2 p ( n 1 － n 2 ) r / l
C.
D r = 0 , d =( n 1 － n 2 ) r , D j =2 p ( n 1 － n 2 ) r / l
D.
D r = 0 , d =( n 1 － n 2 ) r , D j =2 p ( n 1 － n 2 ) r
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【单选题】Read the following paragraphs carefully and then select the most appropriate topic sentence. ________________________________ They know the difference between what is and what should be.They also know...
A.
Mentalyy healthy people take responsibilities for their own actions.
B.
Mentally healthy people are not frightened by the unknown.
C.
Mentally healthy people have a good self-image.
D.
Mentally healthy people are realistic.
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【单选题】如图所示,设 s 1 、 s 2 为两相干光源发出波长为 l 的单色光,分别通过两种介质 (折射率分别为 n 1 和 n 2 ,且 n 1 > n 2 )射到介质的分界面上的 P 点,己知 s 1 P = s 2 P = r ,则这两条光的几何路程 D r ,光程差 d 和相位差 D j 分别为 [ ]
A.
D r = 0 , d = 0 , D j = 0 .
B.
D r = ( n 1 － n 2 ) r , d =( n 1 － n 2 ) r , D j = 2 p ( n 1 － n 2 ) r / l .
C.
D r = 0 , d =( n 1 － n 2 ) r , D j = 2 p ( n 1 － n 2 ) r / l .
D.
D r = 0 , d =( n 1 － n 2 ) r , D j = 2 p ( n 1 － n 2 ) r .
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【单选题】听力原文：W: Things aren't what they used to be, are they? M: No, they aren't. Everything is upside down these days, People haven't even got good manners any more. Look at the way children act. Q: What are...
A.
About children's health.
B.
About money.
C.
About social manners.
D.
About old people's health.
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【判断题】“零落成泥碾作尘,只有香如故”是南宋词人陆游《卜算子,咏梅》中的名句。
A.
正确
B.
错误
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【单选题】如图所示,设s1、s2为两相干光源,初相相等,发出波长为l(真空)的单色光,在两种介质中波长分别为 ,两束光在P点相遇,则P点干涉相消的条件为 1 2 3 4
A.
①正确
B.
②正确
C.
②③正确
D.
②③④正确
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【单选题】听力原文：W: Things aren't what they used to be, are they? M: No, they aren't. Everything is upside down these days. People haven't even got good manners any more. Look at the way children act. Q: What are...
A.
Children's health.
B.
Social manners.
C.
Money.
D.
Old people's health.
查看完整题目与答案
【单选题】听力原文：W: Things aren't what they used to be, are they? M: No, they aren't. Everything is upside down these days. People haven' t even got good manners any more. Look at the way children act. Q: What ar...
A.
About children's health.
B.
About social manners.
C.
About money.
D.
About old people's health.
查看完整题目与答案
相关题目：
【单选题】如图所示,设s 1 、s 2 为两相干光源并且初相位相同,发出波长为 的单色光,分别通过r 1 和r 2 的路径到达P点,r 2 的路径中有一块折射率为n厚度为d的介质。己知s 1 P = s 2 P = r,则这两条光的几何路程差 ,光程差 和相位差 分别为
A.
, ,
B.
, ,
C.
, 0,
D.
, ,
查看完整题目与答案
【简答题】“凹肚脐(肚脐疤)”
查看完整题目与答案
【单选题】如图所示，设S1、S2为两相干光源发出波长为l的单色光，分别通过两种介质(折射率分别为n1和n2，且n1>n2)射到介质的分界面上的P点，己知S1P =S2P= r，则这两条光的几何路程Dr, 光程差d 和相位差Dj 分别为 [ ]【图片】
A.
D r = 0 , d =0 , D j = 0
B.
D r = ( n 1 － n 2 ) r , d =( n 1 － n 2 ) r , D j =2 p ( n 1 － n 2 ) r / l
C.
D r = 0 , d =( n 1 － n 2 ) r , D j =2 p ( n 1 － n 2 ) r / l
D.
D r = 0 , d =( n 1 － n 2 ) r , D j =2 p ( n 1 － n 2 ) r
查看完整题目与答案
【单选题】Read the following paragraphs carefully and then select the most appropriate topic sentence. ________________________________ They know the difference between what is and what should be.They also know...
A.
Mentalyy healthy people take responsibilities for their own actions.
B.
Mentally healthy people are not frightened by the unknown.
C.
Mentally healthy people have a good self-image.
D.
Mentally healthy people are realistic.
查看完整题目与答案
【单选题】如图所示,设 s 1 、 s 2 为两相干光源发出波长为 l 的单色光,分别通过两种介质 (折射率分别为 n 1 和 n 2 ,且 n 1 > n 2 )射到介质的分界面上的 P 点,己知 s 1 P = s 2 P = r ,则这两条光的几何路程 D r ,光程差 d 和相位差 D j 分别为 [ ]
A.
D r = 0 , d = 0 , D j = 0 .
B.
D r = ( n 1 － n 2 ) r , d =( n 1 － n 2 ) r , D j = 2 p ( n 1 － n 2 ) r / l .
C.
D r = 0 , d =( n 1 － n 2 ) r , D j = 2 p ( n 1 － n 2 ) r / l .
D.
D r = 0 , d =( n 1 － n 2 ) r , D j = 2 p ( n 1 － n 2 ) r .
查看完整题目与答案
【单选题】听力原文：W: Things aren't what they used to be, are they? M: No, they aren't. Everything is upside down these days, People haven't even got good manners any more. Look at the way children act. Q: What are...
A.
About children's health.
B.
About money.
C.
About social manners.
D.
About old people's health.
查看完整题目与答案
【判断题】“零落成泥碾作尘,只有香如故”是南宋词人陆游《卜算子,咏梅》中的名句。
A.
正确
B.
错误
查看完整题目与答案
【单选题】如图所示,设s1、s2为两相干光源,初相相等,发出波长为l(真空)的单色光,在两种介质中波长分别为 ,两束光在P点相遇,则P点干涉相消的条件为 1 2 3 4
A.
①正确
B.
②正确
C.
②③正确
D.
②③④正确
查看完整题目与答案
【单选题】听力原文：W: Things aren't what they used to be, are they? M: No, they aren't. Everything is upside down these days. People haven't even got good manners any more. Look at the way children act. Q: What are...
A.
Children's health.
B.
Social manners.
C.
Money.
D.
Old people's health.
查看完整题目与答案
【单选题】听力原文：W: Things aren't what they used to be, are they? M: No, they aren't. Everything is upside down these days. People haven' t even got good manners any more. Look at the way children act. Q: What ar...
A.
About children's health.
B.
About social manners.
C.
About money.
D.
About old people's health.
查看完整题目与答案