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【单选题】
某人站在10m高处,将质量为6Kg的铅球以5m/s的速度水平抛出,他对铅球做的功为( )A.
75J
B.
约为600J
C.
约为675J
D.
约为525J
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举一反三
【单选题】Part A Directions: You will hear 10 short dialogues. For each dialogue, there is one question and four possible answers. Choose the correct answer ― A, B, C or D, and mark it in your test booklet. You...
A.
She knows Professor Arnold has come.
B.
She thinks Professor Arnold has checked in.
C.
She is sure that Professor Arnold has arrived.
D.
She doesn't know whether Professor Arnold has arrived.
【简答题】添加程序段,实现数组元素逆置 #define N 5 void main() { int i; int a[N]={1,2,3,4,5}; for(i=0;i
【单选题】关于封闭放样造型的操作，下列选项正确的是
A.
只需将缩放 X 改为 0
B.
只需将缩放 Y 改为 0
C.
只需将缩放 Z 改为 0
D.
将缩放 X 、 Y 、 Z 的值都改为 0
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