A.若m1>
| ||||
B.若m1<
| ||||
C.若m1=
| ||||
D.若m1>
|
L+s |
t |
| ||
t |
s |
t |
L+s |
t |
| ||
t |
s |
t |
(2 m1-m2)L |
2( m1+m2+M) |
m2 |
2 |
(2 m1-m2)L |
2( m1+m2+M) |
m2 |
2 |
(m2-2m1)L |
m1+m2+M |
m2 |
2 |
A.5m甲=m乙 | B.10m甲=m乙 | C.m甲=m乙 | D.2m甲=m乙 |
A.1m/s | B.2m/s | C.3m/s | D.4m/s |
21 |
21 |
32 |
10 |
126 |
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