以下鼻窦开口正确的为()
A.额窦开口于下鼻道
B.额窦和上颌窦开口于中鼻道
C.筛窦和蝶窦开口于中鼻道
D.额窦开口于上鼻道
E.额窦和蝶窦开口于上鼻道
参考答案:B
His aunt’s letters _____him of those beautiful days when they used to live together in his hometown.
A.call up
B.call for
C.call on
D.call at
工资集体协商的含义是什么?