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第一大题.第九小题. motion detector是什么意思 第一大题第九小题怎么写? circular motion是什么意思 motion 第七题第一小题,九题第一小题 王东是一个游泳爱好者,一天,他在河里游泳,逆流而上,途中不慎将游泳帽落入水中,游泳帽随河水漂流而下.过了8分钟后他发现游泳帽丢失了,立即返身往回游,问王东返回游了多长时间才追上他 还要在文中找到,★ Arriving in New York There are three airports in New York.When you arrive at one of them,you can take a bus or taxi to any place in New York.★ Public transport In New York there’s a good bus and subway service.If you are 科学作业A本七下答案 Cr y 什么意思 （用八上的知识解答）流体阻力的大小与运动物体的(),正()的大小,相对于流体的()大小以及流体的（）有关 开关CR什么意思 夸父逐日读音夸父的读音一直都是一个有争论有读(kuà fǔ)和(kuā fù)到底那个是正确的,一定要有依据, wo de shu ru fa mei le zen me ban 爱莲说表达莲最可爱的句子 now to our topic这样说对吗?是想说开始我们的主题讨论，我想用 start/discuss our topic，但是我同学坚持用这个。 求该函数的值域,最好用换元法. ( )there ( )at home?a.Have,anyone b.isn't,anyone c.has,someone d.aren't,everyone There isn't much____(food) at home 回答 设有数列{an},a1=5/6,若以a1a2```an为系数的一元二次方程an-1x2-anx+1=0(n属于正整数,且n大于等于2)都有根α,β满足3α-αβ+3β=1（1）求an（2）求{an}的前n项和Sn 怎么回答What's the population of...It's...后面要不要加people?比如It's 2 million.还是It's 2 million people? 选择:What's the population of __A.German B.Germany C.Germen为什么? When a firm is maximising profit in the short run,it is always true that:Price elasticity is equal to -1 Total Cost is equal to Total Revenue Price will be equal to Average Total Cost Marginal Revenue is equal to Marginal Cost None of the above 五（1）班的男生人数和女生人数同样多.选派18名男生和26名女生参加实践活动,剩下的男生是女生的3倍.五（1）班原来男、女生各多少人? 1、He's the man who is talking to Liz.(变为分词做定语) 2012的平方+144-24乘2012分解因式 数学30度,45度,60度对应的三角函数 三角函数30 45 60特殊角值是怎么得出的 The Rescue A Bend in the Road 谁有Sparks的这些小说请发到xuyungexiaolv@163.com非常感谢The RescueA Bend in the RoadThe GuardianThe WeddingThree Weeks with My Brother(with Micah Sparks)True BelieverAt First SightThe Lucky One we are the world歌曲,要1984年MJ的群星版的,请发我邮箱tom_snake@163.com. As soon as she saw a snake on the road,she started crying at the top of her _____ A:sound B:voice C:noise D:shout 怎么翻译 practice+s表示啥意思何时才能加s 举例还有说明用法