these写出单词的单数形式

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• 写出句子中划线单词的对应词.1.He has a son and a____.Son画线的2.Oh,they are my mother and_____.mother画线的3.This is John and_____is Mary4.He is my friend Jack and_____is my sister Nancy.He画线 5.---Are these your pens?---No,_____are my pens.these划线的
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• 某化工材料经销公司购进一种化工原料,购进价格为每千克30元,物价部门规定其销售单价不得高于每千克70元,也不得低于30元,市场调查发现,单价定为70元时,日均销售60千克；单价每降低1元,日均多售出2千克,在销售过程中,每天还要支出其他费用500元,(天数不足一天时,按整天计算）,设销售单价为X元,日均获利为Y元.(1)求Y关于X的二次函数解析式,并注明x的取值范围（2）将1中所求出的二次函数用配方法配成Y=a（x+b/2a）^2+ 4ac-b^2/4a的形式,写出顶点坐标,并指出单价为多少时,日均获利最多,是多少?
• 跟据例词划线部分的字母和读音,写出一个新单词,并写出它的中文意思（财富悬赏 10）1、nurse ur2、light gh3、car ar 4、down ow5、follow ow6、touch ou 7、may ay8、London o9、together ther 10、order or11、my y12、every y五年级的
• 用所给单词的正确形式完成短文too,each,think,sell,buy,feel,eat,pass,give,pay Jack and Bill are both seven years old.One day they went out to( )pies together.Before they went out,Jack's mother told Jack,"You take twelve pies,and sell them for five cents ( ).You mustn't eat them,and you mustn't ( ) any of them to othera." Bill's mother told Bill the same words.They went to town together.But after a whole morning,Bill sold only one pie.Bill ( )very hungry,but
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• 谁能告诉我下列单词的-ing形式exercise------talk------shout------work------color------cut------think------jog------pracice
• 将划线部分的字母换一换,使之成为另一个单词,并写出汉语意思.shirt-----( ) cat------( ) nice--------( ) grade-------( )cold-----( )shirt在i后面画线 cat在a后面画线 nice在c后面画线 grade在d后面画线 cold在d后面画线
• 用所给单词的适当形式完成短文In the future,we (have) a lot of tree time.Everyone (have) a small car.It (be) hot all year so the winter (be) very short.There (be) heavy rain in spring and autumn.And our homes (be) warm in winter and hot in summer.We (feel) very comfortable.And no one (do) heavy and difficult jobs,because robots (help) us do the work.I think we (have) a good time at that time.
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