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【单选题】
Z11-02-14. 在电场强度 和磁感应强度 方同一致的电场和磁场中,有一运动着的电子, 某一时刻速度 的图(1)和图(2) 所示,则该时刻图1和图2 中运动电子的法向加速度的大小分别为___、___,图1和图2 中切向加速度的大小分别为___、___。(设电子的质量为m,电量为e)
A.
； ； ； ；
B.
；0； ； ；
C.
； ； ； ；
D.
； ； ； 。
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参考答案：
举一反三
【单选题】We would allow you a discount()2%.
A.
with
B.
for
C.
on
D.
of
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【简答题】Direction: Each of the following ten sentences has one word/phrase underlined to be matched by the corresponding word/phrase chosen from the box provided below. You may find in the box more words/phra...
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【简答题】Direction: Each of the following ten sentences has one word/phrase underlined to be matched by the corresponding word/phrase chosen from the box provided below. You may find in the box more words/phra...
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【单选题】What claim is made about the Olassen Wireless Telephone Headset?
A.
It fits comfortably on any adult.
B.
It works with any wireless telephone.
C.
It was originally developed for the music industry.
D.
It produces better sound than face-to-face conversation.
查看完整题目与答案
【单选题】headset
A.
耳机
B.
话筒
C.
手机
D.
电话
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【单选题】Direction: You are required to complete the following sentence by deciding on the most appropriate word or words from the 4 choices marked A, B, C, and D. If you are now , you need to do more exercise...
A.
in forties
B.
in your forty
C.
in the forties
D.
in your forties
查看完整题目与答案
【简答题】Direction: Each of the following ten sentences has one word/phrase underlined to be matched by the corresponding word/phrase chosen from the box provided below. You may find in the box more words/phra...
查看完整题目与答案
【单选题】Whichone is equivalent to“headset”？
A.
头戴式耳机
B.
头盔
C.
耳塞
D.
帽子 ‍
查看完整题目与答案
【简答题】Direction: Each of the following ten sentences has one word/phrase underlined to be matched by the corresponding word/phrase chosen from the box provided below. You may find in the box more words/phra...
查看完整题目与答案
【单选题】The World's Best Telephone Headsets The Olassen Wireless Telephone Headset represents a revolution in telephone headset design. Every headset contains two embedded microphones. The first microphone pi...
A.
It has two microphones.
B.
It has adjustable headphones.
C.
It has lightweight earphones.
D.
It has a digital volume control.
查看完整题目与答案
相关题目：
【单选题】We would allow you a discount()2%.
A.
with
B.
for
C.
on
D.
of
查看完整题目与答案
【简答题】Direction: Each of the following ten sentences has one word/phrase underlined to be matched by the corresponding word/phrase chosen from the box provided below. You may find in the box more words/phra...
查看完整题目与答案
【简答题】Direction: Each of the following ten sentences has one word/phrase underlined to be matched by the corresponding word/phrase chosen from the box provided below. You may find in the box more words/phra...
查看完整题目与答案
【单选题】What claim is made about the Olassen Wireless Telephone Headset?
A.
It fits comfortably on any adult.
B.
It works with any wireless telephone.
C.
It was originally developed for the music industry.
D.
It produces better sound than face-to-face conversation.
查看完整题目与答案
【单选题】headset
A.
耳机
B.
话筒
C.
手机
D.
电话
查看完整题目与答案
【单选题】Direction: You are required to complete the following sentence by deciding on the most appropriate word or words from the 4 choices marked A, B, C, and D. If you are now , you need to do more exercise...
A.
in forties
B.
in your forty
C.
in the forties
D.
in your forties
查看完整题目与答案
【简答题】Direction: Each of the following ten sentences has one word/phrase underlined to be matched by the corresponding word/phrase chosen from the box provided below. You may find in the box more words/phra...
查看完整题目与答案
【单选题】Whichone is equivalent to“headset”？
A.
头戴式耳机
B.
头盔
C.
耳塞
D.
帽子 ‍
查看完整题目与答案
【简答题】Direction: Each of the following ten sentences has one word/phrase underlined to be matched by the corresponding word/phrase chosen from the box provided below. You may find in the box more words/phra...
查看完整题目与答案
【单选题】The World's Best Telephone Headsets The Olassen Wireless Telephone Headset represents a revolution in telephone headset design. Every headset contains two embedded microphones. The first microphone pi...
A.
It has two microphones.
B.
It has adjustable headphones.
C.
It has lightweight earphones.
D.
It has a digital volume control.
查看完整题目与答案
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