根据《证券法》第一百四十七条规定，证券公司为客户保存资料的期限不得少于( )年。
A．10 B．15 C．20 D．25
参考答案：C
The door opened suddenly and ____, laughing and shouting.
A．three boys coming in
B．come in three boys
C．in coming three boys
D．in came three boys
简述经营租赁和融资租赁的主要区别。
