肯氏第一类缺失义齿的后腭杆应()
A.与黏膜密合
B.离开黏摸0.5~1.0mm
C.离开黏摸1.5~2.0mm
D.离开黏摸2~2.mm
E.离开黏摸3~4mm
参考答案:B
It is reported that women with demanding jobs are almost __________ to suffer a heart attack .
A.as likely twice
B.likely twice as
C.twice likely as
D.twice as likely
在质量控制中,( )是用来寻找某种质量问题产生原因的有效工具。
A.直方图B.因果分析图C.排列图D.控制图