人民币的货币代码是什么？
参考答案：人民币的货币代码是CNY
哮喘的主症为（）。
A、喉中有痰
B、咳嗽气喘
C、喉中鸣响
D、痰稠难咯
E、呼吸困难
The majority of doctors _____ smoking is harmful to health. [ ]
a. are believed
b. had believed
c. has believed
d. believe
