题目

—Speak less of your role in the game,and more of ________ your teammates have done.     —I will.     A.what               B.which           C.why            D.that   答案:A如图,在△ABC中,点D、E分别在边AB、AC上,如果DE∥BC,且∠DCE=∠B,那么下列说法中,错误的是(   )A. △ADE∽△ABC B. △ADE∽△ACD C. △ADE∽△DCB D. △DEC∽△CDB C 【解析】试题解析:∵DE∥BC, ∴△ADE∽△ABC,∠BCD=∠CDE,∠ADE=∠B,∠AED=∠ACB, ∵∠DCE=∠B, ∴∠ADE=∠DCE, 又∵∠A=∠A, ∴△ADE∽△ACD; ∵∠BCD=∠CDE,∠DCE=∠B, ∴△DEC∽△CDB; ∵∠B=∠ADE, 但是∠BCD<∠AED,且∠BCD≠∠A, ∴...
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