设
,则A-1=______.
参考答案:[*]
解析:本题考查矩阵求逆,是一道基础题. 对于[*],求出即可得.
Palmer and his fellow linguists believed that a mastery of some ______ words would greatly assist foreign language learning.
A.1,000
B.2,000
C.3,000
D.4,000
对原有客户的回访比例应当不低于上年末客户总数(不含休眠账户及中止交易账户客户)的()。
A.0.05%
B.0.1%
C.0.15%
D.0.2%