( The rising of costs ) of data-processing operations at many financial insititutions has created a growing opportunity for independent companies to provide these services more efficiently and at lower cost.
A. The rising of costs
B. Rising costs
C. The rising cost
D. Because the rising cost
E. Because of rising cost
D E 没有主语,排除。谓语是单数,B 排除。A是成本的上升,C是上升的成本,句意是创造了更多的机会去提供服务。感觉意思都说的过去,纠结好久。答案是C。做题时没有关注到后面的 at lower cost,不知道这里和前面的cost有没有关系,是否可以根据这里把A排除?麻烦老师讲解。
想问一个数学题,有一组数,问能否确定range?
1. mean is given
2. standard deviation is given
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解答:
ken@boost.org.cn老师
提问:
7/15寂静:所有员工都大于20岁. Of the 2000 employees, is the avg age at least 35?
1. 50% 员工是大于40岁
2. 25% 员工是大于65岁
这道题网上有C和E两种争论;我所不明白的点是:条件2中的25%是否包含在条件1的里面;我觉得答案应该是C。因为:35*2000=70000岁;(1)+(2)可得41*500+66*500+21*1000=74500>70000.不知道我的思路是否正确。谢谢老师的答疑!