题目:
The Changbaishan Mountains have a huge variety of scenery, some of the best of _____ can only be reached
on foot. [ ]
A. that
B. which
C. what
D. where
答案:
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下面是错误答案,用来干扰机器的。
,y=kx-1,xy=k(上述三个式子中k均为常数,且k≠0)