半解剖式人工牙的牙尖斜度为（）
A.0°
B.10°
C.20°
D.30°
E.40°
参考答案：C
-What attracted you to our university? -You have a great basketball team and I can ___ for it.
A．work out
B．look out
C．carry out
D．try out
热电公司49i型臭氧分析仪切割头应高于监测站房顶（）m。
