题目

如图，已知∠1=∠2， ∠3=∠4。试说明AC=AD成立的理由。 请同学们完成下列填空.      解：∵ ∠3=∠4（ 已知   )    ∴ ∠ABC=∠ABD(             )在△ABC和△ABD中，    ∠1=∠2(  已知   )，             (       ），∠ABC=∠ABD，∴△ABC≌△DEF（      ）,∴AC=AB（                      ）.In 1919, Princess Bazzar of Luxembourg’s royal family met the royal kitchen helper Leon. Many nights, Leon went into the kitchen and made ice-cream for Bazzar. They soon fell in love. But because of their different social status, both of them burried the feelings.Soon, Bazzar was made to accept an arranged royal marriage. For days, Leon could not see Bazzar, he was with impatience. Finally, Bazzar at the table a month later. While serving desserts, Leon the letters DOVE, which is an abbreviation of DO YOU LOVE ME with hot chocolate on Bazaar’s ice-cream. Leon that Bazzar could understand his feelings.A few days later, Bazzar got . One year later, Leon could not the mental suffering and left the royal kitchen. Years later, he and his own family a candy store.Many years later, Bazzar remembered that that afternoon she ate the ice-cream made by Leon, but didn’t see the letters.Hearing this, Leon broke down in tears, and he finally understood the past misunderstandings. If that chocolate had been , those letters would never have melted, and he would not have lost his last chance. Leon decided to create a solid chocolate which can a long time.After lots of , the chocolate Dove was finally made and each piece of chocolate was engraved with the letter “DOVE”. It’s a symbol of the love between Leon and Bazzar.Now more and more people fall in love with this chocolate. Giving someone DOVE means sending the whisper of love: DO YOU LOVE ME?1.A. calling B. burning C. working D. talking2.A. stood up B. turned up C. stayed up D. dressed up3.A. wrote B. sent C. mixed D. noticed4.A. expected B. declared C. allowed D. promised5.A. sick B. angry C. married D. bored6.A. reduce B. stop C. repeat D. bear7.A. left B. visited C. ran D. found8.A. confusing B. interesting C. melting D. annoying9.A. stable B. powerful C. frozen D. solid10.A. stand B. spare C. take D. preserve11.A. breaks B. research C. pressure D. problems12.A. firmly B. immediately C. quickly D. luckily