弯制钢丝卡臂进入基牙倒凹的深度为( )。
A.<0.25mm
B.0.25~0.5mm
C.0.5~0.75mm
D.0.75~1.0mm
E.>1.0mm
参考答案:C
22. Was it _____the conference of APEC that made Shanghai the focus of the world then?
A.holding
B.to hold
C.held
D.having held
弯侧滑仪上的小飞机直接显示()。
A.滚转角速度和转弯角速度
B.转弯角速度和坡度
C.滚转角速度和坡度