用三面刃铣刀加工矩形螺旋槽时,铣刀的两侧切削刃的运动轨迹是()。
A.一直线
B.曲线
C.一平面
D.曲面
参考答案:C
In _____ of the dead soldier, a grand ____ was built on the spot of the greatcampaign (战役) . [ ]
A. memory; memory
B. memory; memorial
C. memorial; memory
D. memorial; memorial
皮肤黏膜念珠菌病最常见的损害有()
A.皮肤擦烂
B.肉芽肿
C.鹅口疮
D.全身粟粒疹
E.水疱疹