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【单选题】
Object 1 has twice the mass of Object 2. Each of the objects has the same magnitude of momentum. Which of the following statements is true?A.
Both objects can have the same kinetic energy.
B.
One object has 0.707 times the kinetic energy of the other.
C.
One object has twice the kinetic energy of the other.
D.
One object has 4 times the kinetic energy of the other.
E.
None of the others.
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【简答题】A．She used to be on time for work. B．She is often late for work. C．She is never late for work. D．She has done a lot of new things.
【单选题】— _____________ does she go to work? — She goes to work by bus. [ ]
A.
Where
B.
Who
C.
How
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