一老年患者近来反复出现夜间呼吸困难,被迫坐起,坐起后呼吸困难减轻,最可能的诊断是
A.心源性哮喘
B.支气管肺癌
C.慢性支气管炎
D.变态反应性肺浸润
E.肺气肿
参考答案:A
—What kind of music do you like?
—I like music _____ I can sing along with. [ ]
A. who
B. that
C. what
D. where
论述你对网络道德问题的看法?