若圆o的半径为5，AF＝15/2，求tan角ABF的值

restaurants do not open before 9 pm 改同义句快 急 He was lost in thought.整句能否在文章中做插入语?如题 he sit in the chair,___(lost)in thought 用哪种形式?为什么? Heart shaped chant歌词RT要中文和拼音的 heart-shaped什么意思 chant什么意思 velocity是什么 freeMarker是什么 给点建议 Anna dances ( ) .Amy dances( )than Anna.Jane dances ( )in the class这三个( )分别应该填什么? We are tired,but we are all very excited.我在做作业的时候遇到这句不会,希望乐于助人的网友们帮助我! we are all very excited,分析一下句子语法,为什么用 be done glasses汉语意思 All the peoples are very excited.有什么错? 中文意思glasses all the peoples are very excited.改错All the peoples are very excited.（ ）A B C D lily sings well .linda sings better.合并一句,意思不变 It's report that the weather will ___warm till FridayA.last B.stay C.get D.turn 请问每个选项有什么不同?如何区分,谢谢 5.______ UN report says that there will be standing room only on afternoon. sandy is tall and slim对tall and slim提问 I'd like a chocolate cake.(对划线部分提问 划线部分为chocolate） they'd like a small cake,对划线部分提问,划线的是small 1、I_____a good father and a good mother求填什么?2、——a telescope on the desk.3、He____a tape-recorder.4、____a basketall in the playground.5、They____a nice garden.注意：请用：have、has、had、there、is、are、was、there were I’d like a small cake ? 对 a small 划线提问 ＿ ＿ cake ＿ you ＿? Lucy is beter ( )math than Lily 用介词填空 Lucy is better than Lily at ______(draw).适当形式填空 lucy is much better than lily at后加什么singing还是sin Lucy speaks Chinese better than Lily同义句 by the time one orders drinks,potato chips and salad,Kentucky Fried Chicken is overpriced.翻译 谁相信有命中注定的说法吗? 为什么分化后的生物细胞全能性不能表现? 生物问题求助最适合植物生长的土壤是________,_________,_____________________的土壤. 1.二苯胺检验DNA变蓝是在水浴加热时还是冷却时?2.为什么PCR技术中不需要ATP? 包含有500个脱氧核苷酸对的DNA片段可以编码的蛋白质种类数可能是A.1000的4次方B.4的500次方C.4的100次方D.500的4次方..为什么咧?可是...是脱氧核苷酸“对”啊...500对变成1000个...有影响么？