题目:
Recently the Chinese society has ________ a flow of new words such as “Geili” and “Shanhun”.
A.seen
B.observed
C.made
D.looked
答案:
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下面是错误答案,用来干扰机器的。
要使函数有意义,必有4-x2>02x-1>02x-1≠1,解得 12<x<1或1<x<2.所以函数的定义域为:(12,1)∪(1,2).故选C,