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【單選題】
質(zhì)點做勻速圓周運動時，下面說法正確的是：
A.
向心加速度一定與旋轉(zhuǎn)半徑成反比，因為a = v2/r
B.
向心加速度一定與角速度成正比，因為a = ω2r
C.
角速度一定與旋轉(zhuǎn)半徑成反比，因為ω= v/r
D.
角速度一定與轉(zhuǎn)速成正比，因為ω= 2πn
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舉報參考答案：
舉一反三
【單選題】The underlined sentence probably means________.
A.
I taught myself a lesson by talking to them
B.
I learned something important instead of only helping them
C.
I only wanted to get something rather than do them a favor
D.
I was glad to have given them a favor
【單選題】What the aged in Songtang Hospital are most worried about is________.
A.
loneliness
B.
death
C.
physical pains
D.
wealth
【單選題】The article gives us a good suggestion about how to evaluate（評價）your child’s work at home. That is to ________.
A.
praise his success
B.
promise him a trip
C.
give him a punishment
D.
promise him a ball
【單選題】Having read the last paragraph, we can conclude that ________.
A.
pride goes before a fall
B.
practice makes perfect
C.
no pains, no gains
D.
failure is the mother of success
【單選題】When volunteers know most of the aged people are dying patients, they feel________ .
A.
sad
B.
disappointed
C.
satisfied
D.
worthless
相關題目：
【單選題】The underlined sentence probably means________.
A.
I taught myself a lesson by talking to them
B.
I learned something important instead of only helping them
C.
I only wanted to get something rather than do them a favor
D.
I was glad to have given them a favor
【單選題】What the aged in Songtang Hospital are most worried about is________.
A.
loneliness
B.
death
C.
physical pains
D.
wealth
【單選題】The article gives us a good suggestion about how to evaluate（評價）your child’s work at home. That is to ________.
A.
praise his success
B.
promise him a trip
C.
give him a punishment
D.
promise him a ball
【單選題】Having read the last paragraph, we can conclude that ________.
A.
pride goes before a fall
B.
practice makes perfect
C.
no pains, no gains
D.
failure is the mother of success
【單選題】When volunteers know most of the aged people are dying patients, they feel________ .
A.
sad
B.
disappointed
C.
satisfied
D.
worthless
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