science lab复数

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• would you like some pears?--No,thanks.I think there ___ enough for usA.is B.are C,has been D.had beenc是不是应该改为have been因为pears 是复数,B也错了,因为要用完成时态请问,你觉得呢?
• 初二英语选择题2道1.Fine Arts as well as Computer Science________my favourite minor________A.is, course B.in,courses C.are,course D.are, courses2.They will see the film HERO_____next week.A.some time B.sometime C.sometimes D.some times写一下原因,谢谢~~第一道B选项是is
• 一道关于单复数的英语选择题you can recognize a tree by the __ of its__A shapes leaves B shape leaf Dshapes leaf
• All but one ____ here.答案是are,all 单独作主语谓语动词的单复数情况如何?All that glitters is not always gold.这儿就用了is 啊
• 复数z=(m-8m+15)+(m²-2m-15)i在复数平面内的对应点为z.(1)实数M为何值时,复数Z为纯虚数.(2)当点Z于点A(1,-2)落在同一象限内,求实数M的取值范围特急
• 设复数z=(m^2-3m+2)+(2m^2-5m+2)i(m属于R) 若z对应的点位于复平面第四象限,求m取值若p是曲线y=2-lnx上任意一点,则p到直线y=-x的最小距离是
• 你喜欢草莓吗?翻译成英语草莓用不用变复数
• 5.若复数cos2θ+isin2θ=1(θ∈R),则θ的一个可能取值为（）A.π/4 B.π/2 C.π D.3π/26.(1-√3i)/(√3+i)²=()A.1/4+√3/4i B.-1/4-√3/4i C.1/2+√3/2i D.-1/2-√3/2i9.设z1,z2是复数,且|z1|=|z2|=1,|z1+z2|=√3,则|z1-z2|的值为（）A.1 B.√2 C.√3/2 D.√2/2
• a=0是复数a+bi（a，b∈R）为纯虚数的（　　）A. 充分不必要条件B. 必要不充分条件C. 充要条件D. 既不充分又不必要条件
• All but one相关的语法请问,all but one后面不用介词、直接加名词的话,名词应该用单数还是复数呢?比如:All but one child are living together;All but one children are living together.这两句话哪句才是正确的呢?究竟应该是all来修饰后面的名词,还是one来修饰呢?后面的谓语的数我是知道的,不论如何,都是复数.关键就是前半部分.如果是all来修饰名词,那么这句话的主语中心词就是children,但如果是one来修饰,那么all就会是中心词,作名词用.请各位不吝赐教,在此先谢过了!非常感谢各位的及时回答，其实这句话的难点我想了一下，应该是all和one本身的词性就具有名词和形容词两种，导致后面直接接名词会不知道其该从属于哪一个修饰语。谓语动词的数大可不用提了，复数是必然的。只是名词的数有点难搞。
• Mike is a student.Cindy is a students,too.(改成同义句）Mike is a student and Cindy __________ a student.
• 高中英语短文改错 one day,the mother rat and her babies were having beenone day,the mother rat and her babies were having been a good time in te open air when a female cat came to catch them for his dinner.the mother rat noticed the cat coming nearly so she and her babies all tried to run away at once .they hurried to their home ,that was under a tree .but the baby rats were frightened .they couldn't run very fast .the cat came closer and closer and would come