问题
选择题
It was rainy all day. We had to stay _____ home. [ ]
A. at
B. in
C. from
D. around
答案
答案：A
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It was rainy all day. We had to stay _____ home. [ ]
A. at
B. in
C. from
D. around
答案：A
中x的最大解区间为-2，1，则(a+b)2010值为（）