填两个单词
I_____(live) here for about five years Joe is in trouble now. Maybe we can give him some s_________
1.have lived 我以前在这住了五年 2.suggestions joe有点麻烦了,或许我们能给他些意见。
have lived suggestions
答:依次为t e r 整个单词为international,为国际的详情>>
问:已知a,b属于R,求证:a^2+b^2>=a*b+a+b-1
答:答案如下: 由(a-1)^2+(b-1)^2>=0 得到a^2+b^2+2>=2(a+b)--------(1) 又由(a+1)^2+(b+1)^2>=2(a+...详情>>
问:“ prefer to...rather than ”是一个词组吗?
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