下列山脉中，走向为东北—西南的山脉是（）
A、天山—阴山
B、昆仑山—秦岭
C、长白山—武夷山
D、喜马拉雅山
参考答案：C
If someone invites you to go to his party, but you have no time, what should you not say?__________
A．Sorry, I can’t. I have to study for a test.
B．Sorry, I’m visiting my aunt.
C．I’d love to ,but I have no time.
D．No, thanks.
影响全口义齿稳定的因素不包括（）
A.人工牙排列
B.颌位关系
C.唾液分泌量
D.基托表面形态
E.牙尖斜度
