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【多选题】
设 为二维实空间 中任意的两个向量,下列定义的运算哪些不是内积?A.
1）
B.
2）
C.
3）
D.
4）
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举一反三
【简答题】4第一类污染物采样点位一律设在____的排放口或专门处理此类污染物设施的排口。
【单选题】According to the passage, Joan Ryan ______.
A.
became a sports writer immediately after she graduatcd from college
B.
managed to interview Cribbs though she had failed in the locker room
C.
had three brothers and two sisters and a football coach to help her father
D.
was the sixth female sports writer on all major American newspapers
【简答题】植物细胞内,具有双层膜的细胞器有 ( )。
【简答题】简单控制系统是由一个( )、一个控制器、一个测量元件及变送器和一个执行器组成的。
【单选题】Any fishy or strong smell means the fish isn’t fresh. 19Whenyou have bought a fish and arrive home,
A.
Do not buy it.
B.
The easiest is to steam it.
C.
This is how you can do it.
D.
It just requires a little knowledge.
E.
The fish will go bad within hours.
F.
When buying fish,you should first smell it.
G.
The fats in fish are though to help prevent heart disease.
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