哪颗牙易发生阻生（）
A.上颌中切牙
B.上颌尖牙
C.第三磨牙
D.上颌第一磨牙
E.上颌第一前磨牙
参考答案：C
The Thinker, head in hand, resting his right arm on his left knee, gained its current title when ______ in Paris in 1890.
A．exhibiting
B．exhibited
C．was exhibited
D．being exhibited
下列()情况不宜采用胸外心脏按摩。
A.心跳停止并有助骨骨折的
B.触电后心跳停止的
C.心肌梗塞病人
