行政许可证
参考答案：
即由许可机关向申请人发放的一种证明性文书。
He _____ more than 5,000 English words when he entered the university at the age of 15.
A．has learned
B．would have learned
C．learned
D．had learned
准备持有至到期的债券投资属于非货币性资产。( )
