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【单选题】
如图所示 球 A 在斜面上, 被竖直挡板挡住而处于静止状态,关于球 A 所受的弹力, 接触面均光滑, 以下说法正确的是 ( )A.
A 物体仅受一个弹力作用，弹力的方向垂直斜面向上
B.
A 物体受两个弹力作用，一个水平向左，一个 垂直斜面向下
C.
A 物体受两个弹力作用，一个水平向右，一个垂直斜面向上
D.
A 物体受三 个弹力作用，一个水平向右，一个垂直斜面向上，一个竖直向下
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【单选题】In a recent study on the connection between brain abnormalities and violent behavior, the researcher examined more than three hundred people who had engaged in unusually violent behavior. toward frien...
A.
The incidence of brain abnormalities in the general population is as high as that in the group examined.
B.
The brain abnormalities discovered in those studied are of two distinct kinds.
C.
A wide variety of violent actions were exhibited by those studied.
D.
Those studied in the experiment acted violently toward strangers as well as toward people they knew.
E.
The study drew its subjects from a large geographical area.
【简答题】The jury will try a case of robbery with______(violent).
【简答题】They had the______(fortune) to be hit by a violent storm.
【简答题】[A] strong and determined [B] rough and violent [C] difficult, demanding
【单选题】170 Affinity diagrams are used to:
A.
determine if a process is in control.
B.
determine root cause.
C.
show the relationship among variables.
D.
categorize large amounts of data.
E.
None of the above