组成核酸分子的碱基主要有
A.2种
B.3种
C.4种
D.5种
E.6种
参考答案:D
The seller would sell the shirt for ten yuan, but the customer _____ eight yuan. [ ]
A. sold
B. offered
C. charged
D. asked
试算利息查询的截止日期为()
A.当前系统日期
B.本期账单日
C.上期账单日
D.持卡人选定的日期