如图所示中，梯形abcd中，bc平行于ad，对角线

弥足珍贵的解释 “弥足珍贵”什么意思?特别是弥足? 超数排卵和胚胎移植技术的主要目的是什么? 请问谁能具体解释一下巢式PCR法? 为什么酸碱滴定终点误差要在0.1%内 I really don't know which pair to choose同义句 弥漫的弥是什么意思? 弥漫的弥字的意思 弥漫的弥意思是什么 夜色弥漫的弥意思wr33w 弥漫的弥字是什么意思? ? ? ? 钻怎么组词 自养生物是指可以把无机物转化为有机物的生物,这句话对吗? 钻怎么组词(第一声) 第一声的据可以组哪些词 钻字组词? PCR技术中引物脱落吗?PCR技术中,引物最后会脱落吗? 英文里形容钻石的璀璨用哪个词像中文里说钻石就用璀璨,说金子是就用闪闪发光的.英文里用来形容钻石的此时哪个? 请问在古代用什么词形容钻石? 袋装牛奶都是高温灭菌,会不会破坏蛋白质,变不好呢 形容“钻”的词 形容钻石的词语 用三个词来形容钻石 医药卫生方面,基因工程主要用于基因诊断和基因治疗. (1/2)求完形填空It is no secret that many children would be healthier and Happ 英语翻译It's no secret that many children would be healthier and happier with adoptive parents than with the parents that nature dealt them.That's especially true of children who remain in abusive homes because the law blindly favours biological NOW SHE JUST EATS THE FOOD THAT IS___FOR HER AND SHE IS MUCH HEALTHIER THAN__（选词填空）GOOD,DIET,BEFORE it is believed that santa claus will send many g__to children. There is a risk that many children would have an unhappy future.此句中的would是何用法? 若将一杯质量为a克的食盐水放入蒸发蒸干,得到固体食盐b克,则在原食盐水中,溶质质量是 水溶剂的质量是 蒸干50g溶质质量分数为16％的KNO3溶液,可得KNO3固体多少克?..Please help. 血友病女患者在基因治疗后痊愈,血友病会传给他儿子吗?