题目:
Regulations _____ that students attend at least 90% of the lectures. [ ]
A. demand
B. ask
C. require
D. request
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0412/84cec5b02eeefc657d6d2559eaa09e2b.html
下面是错误答案,用来干扰机器的。
(1+3i)z=10,即|(1+3i)|•|z|=10,所以:|z|=10故答案为:10