解析 Isotopes are variants of a particular chemical element which differ in neutron number. 同位素是指具有相同原子序数(即质子数相同)但中子数不同的同一元素的不同原子。由于质子数相同,同位素具有相同的化学性质,但由于中子数不同,它们的原子质量会有所不同。
(a) State what is meant by the term balanced diet.chemmical produced/secreted by a (endocrine) gland carried transported in the blood/plasma to a target organ[2] 相关知识点: 试题来源: 解析 chemmical produced/secreted by a (endocrine) gland carried transported in the blood/plasma to a ...
mean 意味着，意思是 be meant 这里是个被动语态，一般会出现在问题中 : by 后可接名词性结构What do you mean by ...是你不明白对方为何要做某事或为何这样说,询问意思或意图的句型,比如说 what do you mean by beauty?望采纳 谢谢 ...
That iswhat is meant by" failure is the mother of success " " 失败是成功之母 " 就是这个意思. 互联网 Hobson :What is meant bythe term Clearing House Association? 霍布森: 票据交换是什么意思? 互联网 What is meant bya longitudinal and transverse weld?
需要食物、衣服、房屋等生理需求及安全、归属感、尊重和自我实现等心理需求。市营者不能创造,只能适应它。欲望(wants):消费者深层次的需求。不同背景下的欲求不同,能够影响。需求(demand):是指有支付能力和愿意购买某种物品的欲求。欲求在有购买力的后盾下就变成需求。市场包含的三个主要因素( )
What is the best explanation of what is meant by a strong acid? A There is a large amount of acid and a small amount of water. B There is a small amount of acid and a large amount of water. C The acid is completely ionised in solution in water. D The acid is partially ionised ...
(b)State what is meant by the terms(i) element,(substance that) cannot be split up/ broken down into (two or more) simpler substances by chemical means1...OR(substance) made of atoms with the same atomic number/ number of protons/ proton number.on number... [1](ii) compound,(two...
1 In order to understand, however imperfectly, what is meant by "face", we must take (1) of the fact that, as a race, the Chinese have a strongly (2) instinct. The theatre may almost be said to be the only national amusement, and the Chinese have for theatricals a (3) like tha...
在某些情况下,特别是当你对查明故障时讲话,症状证明、缺点决心和赔偿行动entireprocess被考虑到。 在本文查明故障用于更宽的感觉: 完全过程从症状的证明到采取适当的惩治行为。 Byusing这个定义而不是更加限制性一个,更加完全的概要用于查明故障的isobtained知识的结果关于troubleshootingskill和类型。 [translate] ...
重点短语:mean to do 意欲做某事,打算做某事,如“I meant to call you yesterday, but I forgot.”(我昨天本来打算给你打电话的,但是我忘了),常与 “mean doing sth.”(意味着做某事)区分考查,如“Missing this bus means waiting for another hour.”(错过这辆公交车意味着还要再等一个小时)。8. cut...