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【多选题】
在下列关于动量的描述中,不正确的是()A.
质点始、末位置的动量相等，表明其动量一定守恒；
B.
动量守恒是指运动过程中动量时时相等
C.
系统的内力无论多大，只要合外力为零，系统的动量必守恒
D.
内力不影响系统的总动量，但是要影响其总能量
E.
内力对系统内各质点的动量没有影响
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举一反三
【简答题】“有色金属之乡”之称的有( )
【简答题】A．Hurry to the conference. B．Skip the conference. C．Take the subway. D．Take a bus.
【判断题】Sponsor of a conference is the institution that initiates the conference while organizer of the conference is entrusted by the sponsor to organize the conference.
A.
正确
B.
错误
【判断题】Sponsor of a conference is the institution that initiates the conference while organizer of the conference is entrusted by the sponsor to organize the conference.
A.
正确
B.
错误
【简答题】A．Hurry to the conference. B．Skip the conference. C．Take the subway. D．Take a bus.
【判断题】Sponsor of a conference is the institution that initiates the conference while organizer of the conference is entrusted by the sponsor to organize the conference.
A.
正确
B.
错误
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