没有约定债权确定期间或者约定不明确，抵押权人或者抵押人自最高额抵押权设立之日起满（）年后请求确定债权。
A.1
B.2
C.3
D.4
参考答案：B
It was the first time I _______ there and I was impressed by the friendly people very much.
A．go
B．was going
C．had gone
D．have gone
运送（）材料时，把钩工不得与运送人员和其他设备的列车对车组列同时运送。
A、爆破
B、化学
C、易燃
D、支护
