Who is TOM?A:the boy in blue.B,the boy on blue.C,Yes,he is.D,No ,he is not.

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• Who is TOM?A:the boy in blue.B,the boy on blue.C,Yes,he is.D,No ,he is not.
• Who is TOM?A:the boy in blue.B,the boy on blue.C,Yes,he is.D,No ,he is not.
• A Yes he is B This is my sister C.this is photo of my frieng's family D.yes she isE.And this is his grandfather F.Is the girl his sister \A;Wow!Look at the photo B;_____A;Is the boy in a white jacket your friend?B;Yes he is his name is Tom.______.A;______B;Yes she is A;Is that his mother?B; ____Her name is Emma A; Who's the woman in red?B; She's Tom;s aunt A;Oh,I see .Then is the man in yellow Tom's father?B;_____填序号 其中有一空多余
• 在锐角三角形ABC中，角A，B，C所对的边分别是a，b，c且tanB＝3aca2+c2−b2 （1）求∠B； （2）求sin(B+10°)[1−3tan(B−10°)]的值．
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