sinx的n阶导数公式

小学科学《植物的叶》中,观察到什么,才说他们是同一种叶 Your parents are _____ teachers.a both b neither 生物观察植物叶表皮实验, 年度工作小结怎么写 年度工作总结怎么写啊?我们是太阳能公司营销部的 you must be tired.why not{ }a rest?A.to stop to have B.to stop having C.stop to haveD.stop having he was tired,and he wanted to have a rest,but Tom didn‘t （）They were angry A.agree B.want填什么 He is tired and stop to have a rest?这里stop要加s吗He is tired and stop to have a restHe is tired and stops to have a restHe is tired and he stops to have a rest哪句是对的?为什么呢? 你能叫出这个花园里这些花的名字吗?用英语怎么说? what will you do if your opinion is contrary to your parents 1.What did your parents give you as a present ___ your birthaday?A to B for C at D with2.Two hours ___ enough time to finish reading the book?A is B are C were D was Thank you very much for the invition同意句Thanks ___ ___ for the invition What had they invited them to do last week? They havent got the computers.He ordered them last week.(用关系代词which连接句子) 这个常见的东西物质叫什么?以下哪些细胞器含有？：：内质网、线粒体、高尔基体、叶绿体？ they went to the party and enjoyed ___(them) last weekend 现在这个社会上还有什么物质上的东西存在着意义?谁能帮我解释下?比如掺杂感情 you could have done much better yesterday.why_____?为什么反问是填didn't you而不是couldn't you? 求翻译.With better equipment,we could have done it better. 英语翻译2.它是历史专业的学生（major n.) 3.贝蒂主修经济,而我主修英语.（major v.) 4.只有两门课供你选修.（take）5.你会发觉我们都想和你交朋友（make friends with）6.他把一生都贡献给了为人类 I could have done without 怎么翻译? 用are both或both are填空:My parents ( ) doctors. My parents are （b···）workers 4.My parents ______(be) both office workers. 非生物是具有（ ）的物体 生物是具有__活动的物体.A.惊弓之鸟B.望梅止渴C.杯弓蛇影D.蜻蜓点水 哪个不是生物对外界的刺激作出反应? 什么和什么都属于生物,他们都是有什么的物体 第二堂活动课,有人问一位数学老师,你班共有多少学生,老师回答说：“一半同学在学奥数,四分之一的同学在课外阅读,七分之一在学外语,还剩不足6位同学在球场打球”问该班有多少名学生? 英语连词成句,最好解释一些,4.you/when/it/take/Ice/out of the freezer/melt.5.there.typhoon.not goout/When/most people/a/be6.usually/her/shout at/her parents/cry/Jenny/if7.if.not give/water/plants/them/you/die8.not study/Alex/well/he/if/in t 在一次数学活动课上,胡老师带领九（3）班的同学去测一条南北流向的河宽.如图所示,张一凡同学在河东岸点A出测到河对岸边有一点C,测得C在A的北偏西31°的方向上,沿河岸向北前进21m到达B处, 英语连词成句题, 连词成句 are parents what like your(?) 是What about your parents.还是What are your parents是What about your parents. 还是What are your parents. 你的父母还好吗