加工双斜孔时，通过水平方向旋转台，就使爽些孔位置变成（）孔的位置。
A.平行
B.单斜
C.垂直
参考答案：B
_____, he together with his families ____ escaped from the shaking building when the earthquake struck Lushan County of Ya’an.
A．Unfortunately; narrowly
B．Fortunately; narrowly
C．Absolutely; thankfully
D．Sadly; hopefully
毛发上皮瘤的好发部位是（）
A.鼻唇沟
B.眼睑部位
C.腋下
D.外阴部位
E.手足部位
