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【单选题】
You try to pull an object by tugging on a rope attached to the object with a force . The object does not move at all.What does this imply?A.
There are no other forces acting on the object.
B.
The inertia of the object prevents it from accelerating.
C.
The object has reached its natural state of rest and can no longer be set into motion.
D.
There are also one or more other forces that act on the object with a sum .
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皮皮学刷刷变学霸
举一反三
【单选题】Many people greet _________ ideas nervously because they are afraid of change.
A.
affirm
B.
agony
C.
at ength
D.
glimpse
E.
on urpose
F.
presence
G.
radical
【简答题】'; echo constant("CONSTANT"); ?> 运行结果是什么?
【单选题】Many people greet _________ ideas nervously because they are afraid of change.
A.
radical
B.
presence
【简答题】运行结果是什么?
【简答题】运行结果是什么?
【简答题】髋骨外面的中央的圆形深窝称为 ,耻骨和坐骨围成的孔称为 ,髂骨翼上缘形成弓形的 。
【单选题】header("content-type:image/jpeg"); imagejpeg($img); 这段代码的作用是
A.
文档输入类型是jpeg图像
B.
文档输出类型是gif图像。
C.
文档输出类型是jpeg图像。
D.
文档输入类型是gif图像
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