立式车床立刀架沿滑枕垂直方向没有锁紧，或侧刀架垂直方向没有锁紧，都会造成工件内、外径尺寸超差。( )
参考答案：错
The Shengzhou VI aircraft carried two astronauts into____sky at 9:00 am on October 12, 2005 and the two astronauts will stay in _____space for five days.
A．a; the
B．the; 不填
C．the; the
D．a; 不填
一种细菌的半径为3.9 ×10﹣5m，用小数表示应是（ ）．
