波长的计算公式

One day,a boy and his little sister were sitting by a lake why is life so hard Why Is It So Hard 歌词 why is it so hard to trust ourselves in our life,we always need to get affirmation from others ,at last,we ignored ourselves. why it is so hard to do I never feel borig when I am with him.(改错） 求英文填空,和翻译It was Friday night. Marty was in a chair.His mom was in the kitchen and washing the dishes But before she could finish, 【 1 】didn't feel well and had to stop.She said she would do it after a【2 】. "Are you OK,Mom? 教室里有45个学生的英文——forty five students in the class room who is the one that he can take翻译 All that can be done___________A.has done B.has been done C.have done D.have been done 请选入合适的选项.并解释原因, that,can,be,all,that,done,is 组句 并说出意思 all that can be eaten_____eaten upA.are being B.has been C.had been D.have been 为什么?为什么用三单的形式？ be all you can be 与 be all that you can be 二句的不同之处.二句表达的意思是一样的,都是要表达“做你能做的”.想知道语法上二者有何区别,that的最大用处是什么?加了它对该句的最大影响是什么? The boy was lost .改为同义句The boy couldn't ________ his _____back home.They enjoyed themselves very much in the park.they _____ a good ______in the park. the boy was lost 同义句 the boy couldn't ___his___back home. The boy was________(lost) The boy was loet .(改为同义句） The boy ___ ___.The boy ___ his ____. 同义句转换：The boy was born in the 1940s.The boy was born _____ ______ ______ ______ ______ ______ _______. There are some rubbers under the desk对some rubber 提问 Do you often spend half an hour _____（clean)the classroom after school?填cleaning 为什么呢?是目为有动词spend了吗? 你答错了.you'll spend half an hour flying to Tokyo. "have half an hour of homework"中"have"能改为"do"或者其它动词吗?只要v.+some time + of sth.都成立?RThave some time of sth.后面可以加to do 4.What are the advatanges and disadvantages of shopping online?用英语回答！ David enioyed himself in the park yesterday.改为同义句David ______ ______ _______ _______ in the park yesterday. 用藏语说 “我爱西藏”.我很喜欢西藏,也很喜欢藏族同胞,我想学会这句话,今后去西藏旅游的时候对藏族同胞说.希望西藏不再闹事,国家和平统一.^-^ nick is 2 years qld .his "subject" is only running around ( )me用介词填空 CORD WITH TEST PLUG RUNNING 请问这个应该怎样翻译? 求把这句话“西藏,我来了!”翻译成藏语, 用所给词的正确形式填空. 1. I felt very （ ） when i go back home from school (tire)快点 Danny goes outside.改成将来时态.(用Be going to 形式) Danny's daddy goes to work bike.的中文意思是什么啊? Danny goes past a bank on his way to home.找错