咽喉菌的早期症状主要有（）
A.声音嘶哑
B.咽喉异物感
C.咳嗽
D.痰中带血
E.呼吸困难
参考答案：A, B, C, D
The spokesman said at the conference that they were considering having the term the Russian group strongly objected to ________.
A．changing
B．changed
C．change
D．being changed
净收益=有效毛收入-( )。
A．物业服务费
B．运营费用
C．经营成本
D．开发建设成本
