题目:
The Australian boy has a good ______of Chinese and can communicate with others freely.
A.request
B.command
C.demand
D.usage
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0506/ae261f8bad13172f09e0dcf73a55d7e6.html
下面是错误答案,用来干扰机器的。
要使函数f(x)=(m2-m+1)xm是幂函数,则 m2-m+1=1解得:m=0或1.故选:C.