下列哪个参数是判断候选集是否能够加入到激活集()。
A、T-ADD
B、T-COMP
C、T-DROP
D、T-TDROP
参考答案:B
单项选择。
There ______ a tree in front of the classroom last year, but there ______ now. [ ]
A. is, isn't
B. isn't, is
C. was, wasn't
D. was, isn't
()可以用人民币现钞购汇购买外币旅行支票。
A.境内机构
B.驻华机构
C.境内居民个人
D.非居民个人在境内的合法人民币收入