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【简答题】
设集合A={x|x 2 -2x-3=0},B={x|(x-1)(x-a)=0,a∈R},求A∪B,A∩B.
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【多选题】1 0 .通常的PLC特殊扩展功能模块有哪些类型
A.
. I/O量扩展输出
B.
. 模拟量模块
C.
高速计数模块
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. 扩展单元模块
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A.
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B.
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m1与m2
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A.
of
B.
for
C.
to
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【简答题】ISBN码
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A.
ITF25码    
B.
EAN码    
C.
UCC码
D.
Code39码    
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Codebar码    
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G.
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A.
《茶馆》
B.
《文成公主》
C.
《武则天》
D.
《关汉卿》
【多选题】Read these passive sentences. Select the sentence if the agent is necessary.
A.
I'm sorry, sir. All the cookies have been sold by a salesclerk.
B.
At the charity auction, everything will be sold by a famous chef.
C.
We don't order pizza from that place anymore: it's always delivered cold by the delivery person.
D.
That restaurant is far away. Their food is delivered by a man on a motorcycle.
E.
Karen got sick at the restaurant and was examined by a medical student.
F.
My friend is going to the doctor’s office and will be examined by the doctor at 10:30 a.m.
G.
The professor was honored by the university for her achievements.
H.
The documentary was watched by a TV audience of millions.
I.
Our ideas about nutrition can be influenced by ordinary people.
J.
Because my brother can never make up his mind, he is easily influenced by people.
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A.
正确
B.
错误
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