两组导轨在水平面内的垂直度误差,可用方框水平仪检查。
参考答案:错
Windows 7 was created in 2009, ___ many computer lovers were interested and excited. [ ]
A. where
B. why
C. which
D. when
设立经纪类证券公司其注册资本最低限额为( )万元人民币。
A.3000
B.4000
C.5000
D.6000