人工半解剖式牙的牙尖斜度为
A．0°～3°
B．10°～13°
C．20°～23°
D．30°～33°
E．40°～43°
参考答案：C
一Did you visit many places while you were in Canada?
一Yes,
A．afew quite B only few C．only afew D quite few
英译中：Humidity controlled space
