工程测量平面控制网的坐标系统,应满足测区内投影长度变形值不大于()cm/km。
A. 1.5
B. 2.0
C. 2.5
D. 3.0
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容器按()分类,可分为外压容器和内压容器。
A. 容器内外压力差
B. 容器温度
C. 容器压力
D. 在生产工艺过程中的作用
A(68)copies a photograph,drawing or page of text into the computer.
A. scanner
B. printer
C. display
D. keyboard
A(66)computer is a personal computer whose hardware is capable of using any or all 0f the following media in a program:audio,text,graphics,video and animation.
A. database
B. multimedia
C. network
D. mainframes
A.<Title>B.<BR>C.<Table>D.<H3>
A. <Title>
B. <BR>
C. <Table>
D. <H3>