头颅侧位平片摄影，不能显示下列中的哪一个（）。
A.蝶窦
B.脑室
C.血管沟
D.钙化
E.蝶鞍
参考答案：B
Lack of teamwork can result in _____by rivals when we have a basketball game.
A．defeated
B．being defeated
C．defeating
D．to be defeated
第二级支气管及其分支所辖的范围（）
A.肺门
B.肺叶
C.肺根
D.肺泡
E.肺段
