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【单选题】
根据如图所示AB、CD直线和P、Q平面,选择回答如下题: (8)直线CD在侧面投影面上的投影有积聚性,因此称之为( ) A.一般位置直线或倾斜线 B. 侧垂线 C. 正平线 D. 水平线A.
选择A
B.
选择B
C.
选择C
D.
选择D
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A.
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B.
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C.
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D.
serves
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A.
0
B.
1
C.
2
D.
3
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A.
serves
B.
served
C.
has served
D.
had served
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【单选题】Choose the right structure of the computer which is general used，such as PC8086，Z-80， IBM360/3
A.
Single Instruction Single Data
B.
Single Instruction Multiple Data
C.
Multiple Instruction Single Data
D.
Multiple Instruction Multiple Data
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