B picture
A sister
C doctor
A these
C think
A nurse B picture C shirt A sister B girl C bird A purple B
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相关问题
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The girl is wearing ( ).A:a red shirt B:a white blouse C:a b
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1.These-----are my sisters.A.boy B.girl c.girls
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a-b+c=a+c-b a+(b-c)=a+b-c a-(b+c)=a-b-c a-(b-c)=a-b+c
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(a-b)/(a+b)+(b-c)/(b+c)+(c-a)/(c+a)+(a-b)(b-c)(c-a)/(a+b)(b+
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证明：（a-b/a+b）+（b-c/b+c）+（c-a/c+a）+(a-b)(b-c)(c-a)/(a+b)(b+c)(
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证明(a+b)\(a-b)+(b+c)\(b-c)+(c+a)\c-a)+(a+b)(b+c)(c+a)\(a-b)(b
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（a+b+c）=?（a-b+c）=?（a+b+c）(a+b-c)=?(a-b+c)(a-b-c)=?