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设a⊙b=4a-2b+ab÷2,求x⊙（4⊙1）=64中的未知数x 张大伯卖废纸得到240元,有2元,有5元和10元这三种面值的人民币共50张,其中2元面值和5元面值的张数同样多,10元面值的有多少张? 染色体变异可以用显微镜看到吗? 一道数学题,要算式哈!一辆卡车云矿石,晴天每天运20次,雨天每天可运12次,它一共运了112次,平均每天运14次,这几天中有多少天是雨天? 左边一个女字右边一个亘字是什么字? 178身高,多重算是合适的体重? my brother often helps my mother do some housework 改为同义句 向量共面怎么证 社会实践手抄报的内容怎么写呀 赤字危机是什么? 社会实践手抄报 社会实践见闻手抄报内容急需 财政赤字、经常账户赤字什么意思? 移民赤字什么意思 山村＂＂用静组词 My brother often _____ (去动物园) on Sundays. my brother often doesn't go swimming on sundays哪里有错 my brother often goes [游泳】 on sundays 用动词还是用动名词? 当中央银行发行债券时,可以增加金融系统中的流动性,紧缩货币供应量.这句话哪里错了? People often make do_ to their old public school or college as some repayment for what it has done for them,or in the hope that it may give their child a better chance of entry 一个字,左边是女,右边是亘.是什么字? 环境噪声控制工程,求教大神28题←_← 教室内有六盏灯,两盏灯最亮,两盏灯最暗,则这六盏灯两端的电压关系为A.两盏最亮的灯电压最大B.两盏最暗的灯电压最大C.六盏灯电压一样大D.无法确定我想知道教室里的灯不都是规格相同的 I often went to Water Park______after a day’s work.A.relaxes B.to relaxing C.to relax D.relax 对went to work作出提问 要在昆明学意大利语呢话去那儿啊?我一直很想学意大利语. 怎样控制建筑工程施工工序的质量 建筑工程施工管理解题,帮忙给出具体的分析过程, My brother and l___do___after-school activities.A.often;any B.never;some C.seldom;some D.never;any我知道答案是D,但是我觉得C也算对,摆脱高人解释一下为什么C不对或对 my brotherand i do exercise inthemorning a.often b.neverany c neversome d .seldem some 初中二年级上内容图4-13中串联电路是 并联电路是 有一盏灯短路的是短路的原因是什么 And she never takes ( )exercise A any B some C an