题目

    There's no rose without a thorn(刺). This thought is absolutely necessary to prepare you _____41_____ (experience) less pain and more joy in your journey of life.     With a bird's-eye view, you may realize something meaningful. During your school _____42_____ (year), while joyfully _____43_____ (study) knowledge you are also under the pressure of homework, examinations, _____44_____ ranking. You face crises and pains. Meanwhile, all sorts of complex affairs may happen _____45_____ you and your classmates. In your _____46_____ (young), adolescence may fill you with unrealiz如图，在△ABC中，AB=AC，AD是BC边上的高，过点C作CE∥AB交AD的延长线于点E．求证：CE=AB． 答案见解析． 【解析】试题分析：由等腰三角形三线合一性质可得∠BAE=∠CAE，由CE∥AB可得∠E=∠BAE，进而可得∠E=∠CAE，所以AC=CE，又因为AB=AC，所以CE=AB即可证明. 试题解析： 证明：∵AB=AC，AD是BC边上的高， ∴∠BAE=∠CAE， ∵CE∥AB， ∴∠E=∠BAE， ∴∠E=∠CAE， ∴CE=AC， ...