下列大洲中绝大部分位于南极圈内，四周被大洋环绕的是[ ]
A．南极洲
B．亚洲
C．欧洲
D．非洲
答案：A
用友报表系统中，QM函数的含义是()。
A.期初余额
B.期末余额
C.借方发生额
D.贷方发生额
High-speed trains travel at 300 kilometers an hour, which is about _____ normal trains. [ ]
A. four times the speed as
B. the speed four times of
C. four times as the speed of
D. four times the speed of
