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【单选题】
如图所示物体由A，B两部分组成，其质量分别为M A 和M B ，放置在光滑水平面上，当受力F作用时，A，B之间作用力的大小是（）。A.
等于F
B.
不等于F
C.
大于F
D.
不确定
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举一反三
【简答题】相贯线的基本特性有 和 。
【单选题】When was Albert Einstein awarded the Nobel Prize in Physics?
A.
Albert Einstein was awarded the 1920 Nobel Prize in Physics in 1921.
B.
Albert Einstein was awarded the 1921 Nobel Prize in Physics in 1922.
C.
Albert Einstein was awarded the Nobel Prize in Physics in 1921.
D.
Albert Einstein was awarded the Nobel Prize in Physics in 1920.
【单选题】In 1954, ______ was awarded the Nobel Prize for literature for his 'mastery of the art of modern narration'.
A.
T.S. Eliot
B.
Ernest Hemingway
C.
John Steinbeck
D.
William Faulkner
【简答题】( )是G71、G74、G73粗加工后精加工指令
【简答题】She was awarded a prize for the film.（ ）
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