Even close friends (agree) _________ sometimes.
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You haven’t changed at all---- you still look (exact) __________ the same.
She found it (extreme) _________ difficult to get a job in that city.
(Obvious)___________, I didn’t want to put in too much time making friends.
平面汇交力系平衡的必要条件和充分条件是:所有力在任一轴上的投影的代数和必须等于______。