题目内容

U4R2 PF: Individual needs are considered primary. 个体的需求被放在首位。......The individual sacrifices his or her needs to those of the group. 集体需求的满足可以个人需求为代价。Each is in the constant pursuit of benefits, although ____________________, (个人需求被认为是首要需求, he or she ____________________. (有时为了团体可牺牲他或她的利益) .

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1. Liu Gang:He is very careful and likes to work with numbers.( )2. Lisa: She likes to travel, meet people and make new friends.( )3. Sue: She wants to work in an office, organising files, doing reception and answering calls.( )

质点系对任意一点的动量矩对时间的导数等于作用于该质点系的所有外力对同一点的矩的矢量和。

A. 对
B. 错

质心轴转动惯量是所有平行于质心轴转动惯量的最大值。

A. 对
B. 错

质点系动量矩的变化与外力有关,与内力无关。

A. 对
B. 错

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