问题
选择题
______ is know to us all, China has its own English language newspaper.
A．it
B．which
C．that
D．as
答案
答案：D
as非限制性定语从句才能位于句首。
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______ is know to us all, China has its own English language newspaper.
A．it
B．which
C．that
D．as
答案：D
as非限制性定语从句才能位于句首。
anxn的收敛半径为3，则幂级数
nan(x-1)n+1州的收敛区间为______．