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【单选题】
动量定理适用于______。A.
惯性坐标系
B.
与地球固连的坐标系
C.
相对于地球作匀角速转动的坐标系
D.
相对于地球作匀速直线运动的坐标系
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【简答题】听力原文：M: Although I check the machines on the production line regularly, last week one of them broke down and that cause some long delays, especially for the distribution department, I'm told. I had to...
【简答题】下列哪种编码是常用的英文字符编码（ ）。
【单选题】_______ M/money is important, _____ it doesn’t mean _______.
A.
Although, but, everything
B.
Although, /, everything
C.
/, but, anything
D.
Although, /, anything
【单选题】Although no one is certain why migration occurs, there are several theories. One theory is based upon the premise that prehistoric birds of the northen Hemisphere were forced south during the Ice Age,...
A.
stopped migrating
B.
continued migrating
C.
began migrating again
D.
migrated south and stay there
【单选题】若有以下说明语句:struct student{ int a; double b;}s;则下面的叙述错误的是( )。
A.
struct 是定义结构体类型的关键字
B.
a 和b都是结构体成员名
C.
student 是用户自定义的结构体类型名
D.
student 是用户自定义的结构体变量名
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