扑尔敏的药品通用名是
A．氯苯那敏
B．苯海拉明
C．曲吡那敏
D．阿司咪唑
E．西替利嗪
参考答案：A
解析：扑尔敏是俗名，其通用名是马来酸氯苯那敏。
中国唯一能在极地破冰前行的船只，中国最大的极地考察船是（）？
It was announced that only when the examination papers were handed in ________to go out of the classroom．
A．the students would be permitted
B．had the students been permitted
C．would the students be permitted
D．the students had been permitted
