题目

Sam was __________to make so many mistakes in the English exam.A．careful enoughB．enough carefulC．careless enoughD．enough careless 答案：C解析:略24、已知：如图，在等腰三角形ABC中，∠A=90°，∠ABC的平分线BD与AC交于点D，DE⊥BC于点E．求证：AD=CE．