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【单选题】
如右图所示,在足够大的光滑水平面上放有两个质量相等的物块,其中,物块 A 连接一个轻弹簧并处于静止状态,物块 B 以初速度 v 0 向着物块 A 运动,当物块 B 与物块 A 上的弹簧发生相互作用时,两物块保持在一条直线上运动 。 若分别用实线和虚线表示物块 B 和物块 A 的 v — t 图像,则两物块在相互作用过程中,正确的 v — t 图像是A.
B.
C.
D.
D
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举一反三
【单选题】 Twelve ____ were hurt, but no ___ were lost in that accident.
A.
person, life
B.
people, lives
C.
peoples, lives
【单选题】Twelve ____ were hurt, but no _____ were lost in that accident.
A.
person, life
B.
peoples, lives
C.
people, lives
【单选题】Twelve _______ were hurt, but no _______ were lost in that accident.
A.
person, life
B.
people, lives
C.
peopeles, lives
D.
persons, life
【单选题】Twelve______ were hurt, but no ______ were lost in the accident.
A.
people; life
B.
peoples; lives
C.
person; lives
D.
persons; lives
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