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【多选题】
电子光学系统与光学系统的区别在于
A.
电子光学系统的折射率可以是任意的值，而普通光学系统的折射率在 1 到 2.5 之间
B.
电子光学系统中电子的轨迹是连续变化的曲线，而普通光学系统中光线的轨迹只能是直线
C.
电子光学系统中的电子光学折射率是空间位置的函数，而普通光学系统的折射率只与材料有关，是固定不变的
D.
电子光学系统的边界一旦确定则折射率的空间分布便也完全确定，不能象普通光学系统那样可以修改形貌而不改变其折射率
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参考答案：
举一反三
【单选题】山楂不同炮制品中，行气散瘀宜选（ ）
A.
山楂
B.
炒山楂
C.
焦山楂
D.
山楂炭
查看完整题目与答案
【简答题】If you say going out of ______( 债务 ) is important to you, are you actually doing the things that will lead you to get out of it?
查看完整题目与答案
【单选题】最能提示慢性支气管炎并发阻塞性肺气肿的临床表现是 :
A.
胸痛加重
B.
烦躁不安加重
C.
咳嗽、咳痰加重
D.
呼吸困难逐渐加重
查看完整题目与答案
【单选题】最能提示慢性支气管炎并发阻塞性肺气肿的临床表现是
A.
胸痛加重
B.
烦躁不安加重
C.
咳嗽、咳痰加重
D.
精神症状加重
E.
呼吸困难逐渐加重
查看完整题目与答案
【简答题】根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 Is Dieting OK for Kids? You may know some s and kids who worry about their weight and say they’re going on a diet. You might wonder if you should be on a...
查看完整题目与答案
【简答题】技术形态军事技术形态正在向智能化、网络化、 的方向发展。A. 微型化
查看完整题目与答案
【多选题】Situation: (Joe and Gary, both Amicans, are fiends. They have just run into each other at a store. Joe: Hey. Gary. How've you been? (Joe is happy to see Gary. He slaps him on the back.) Gary: Oh, hi, ...
A.
Joe will apologize and will promise not to go out with Jennifer again.
B.
Joe will say something like, “Wait a minute. You don't own her. You've never been out with her before.”
C.
Joe will get angry with Gary because Gary got angry with him.
查看完整题目与答案
【单选题】最能提示慢性支气管炎并发阻塞性肺气肿的临床表现
A.
胸痛加重
B.
烦躁不安加重
C.
咳嗽、咳痰加重
D.
精神症状加重
E.
呼吸困难逐渐加重
查看完整题目与答案
【单选题】If you are going to point out a fallacy, you should start by saying:________.
A.
It is a fallacy that…
B.
There is a fallacy: it is really stupid to say…
C.
If you are smart enough, you would see there is a fallacy…
D.
There is a fallacy: it is really insane to say…
查看完整题目与答案
【单选题】听力原文：Question: Do you suggest going to graduate school right after undergraduate school or going out in the working world and getting some experience before you get your master's degree? Girl: I would...
A.
In a classroom.
B.
In an interview.
C.
In a panel discussion.
D.
In a consulting process.
查看完整题目与答案
相关题目：
【单选题】山楂不同炮制品中，行气散瘀宜选（ ）
A.
山楂
B.
炒山楂
C.
焦山楂
D.
山楂炭
查看完整题目与答案
【简答题】If you say going out of ______( 债务 ) is important to you, are you actually doing the things that will lead you to get out of it?
查看完整题目与答案
【单选题】最能提示慢性支气管炎并发阻塞性肺气肿的临床表现是 :
A.
胸痛加重
B.
烦躁不安加重
C.
咳嗽、咳痰加重
D.
呼吸困难逐渐加重
查看完整题目与答案
【单选题】最能提示慢性支气管炎并发阻塞性肺气肿的临床表现是
A.
胸痛加重
B.
烦躁不安加重
C.
咳嗽、咳痰加重
D.
精神症状加重
E.
呼吸困难逐渐加重
查看完整题目与答案
【简答题】根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 Is Dieting OK for Kids? You may know some s and kids who worry about their weight and say they’re going on a diet. You might wonder if you should be on a...
查看完整题目与答案
【简答题】技术形态军事技术形态正在向智能化、网络化、 的方向发展。A. 微型化
查看完整题目与答案
【多选题】Situation: (Joe and Gary, both Amicans, are fiends. They have just run into each other at a store. Joe: Hey. Gary. How've you been? (Joe is happy to see Gary. He slaps him on the back.) Gary: Oh, hi, ...
A.
Joe will apologize and will promise not to go out with Jennifer again.
B.
Joe will say something like, “Wait a minute. You don't own her. You've never been out with her before.”
C.
Joe will get angry with Gary because Gary got angry with him.
查看完整题目与答案
【单选题】最能提示慢性支气管炎并发阻塞性肺气肿的临床表现
A.
胸痛加重
B.
烦躁不安加重
C.
咳嗽、咳痰加重
D.
精神症状加重
E.
呼吸困难逐渐加重
查看完整题目与答案
【单选题】If you are going to point out a fallacy, you should start by saying:________.
A.
It is a fallacy that…
B.
There is a fallacy: it is really stupid to say…
C.
If you are smart enough, you would see there is a fallacy…
D.
There is a fallacy: it is really insane to say…
查看完整题目与答案
【单选题】听力原文：Question: Do you suggest going to graduate school right after undergraduate school or going out in the working world and getting some experience before you get your master's degree? Girl: I would...
A.
In a classroom.
B.
In an interview.
C.
In a panel discussion.
D.
In a consulting process.
查看完整题目与答案
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