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【单选题】
在 AutoCAD 2000 中,用户采用指定该点与已知点相对距离的办法来确定某一点相对坐标,为了区别绝对坐标,在相对坐标前加上符号( )A.
&
B.
@
C.
#
D.
%
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【简答题】n. organizations in general that give money, goods or help to people who are poor, sick, etc.慈善事业
【简答题】____ n. organizations in general that give money, goods, or help to people who are poor, sick, etc.
【单选题】Motoring organizations have started a(n. ________ for safer roads in the area.
A.
action
B.
measure
C.
campaign
D.
achievem
【单选题】修配装配法是将尺寸链中各组成环的公差相对于互换装配法所求值（），使其能按该生产条件下较经济的公差加工，装配时尺寸链中某一预先选定的环去除部分材料以改变其实际尺寸，使闭环达到其公差与极限偏差要求。
A.
增大
B.
减小
C.
不变
D.
不确定
【单选题】读图,其中零件序号1、2、3、4分别代表( )
A.
1.轴承、2.键、3.齿轮、4.轴
B.
1.键、2.轴承、3.齿轮、4.轴
C.
1.轴承、2.键、3.轴、4.齿轮
D.
1.键、2.轴承、3.轴、4.齿轮
【单选题】A new report by the U.N. AIDS organizations finds the global AIDS epidemic is worsening. The agency says more people in all regions around the world are becoming infected with HIV, the virus which cau...
A.
A kind of deadly disease which cannot be controlled right now.
B.
An outbreak of a contagious disease that spreads rapidly and widely.
C.
Very popular.
D.
A rapid spread, growth, or development.
【简答题】A. disregard B. prevalent C. probe D. abolish E. realizing F. radically G. assault H. reassure I. medieval J. wealthy K. skeletons L. functioning M....
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