15 times heavier: those C. 16 times as heavier; that D. 16 times as heavy; those 相关知识点: 试题来源: 解析 【答案】A 【解析】试题分析:考查倍数表达法。句意:氧原子是氢原子重量的16倍。is 16 times havier是倍数表达法,that代指weight,可知选A。考点:考查倍数表达法反馈 收藏 ...
【题目】The atomic weight of oxygen is___than ___of the hydrogen. A. 15 times heavier; that B. 15 times heavier: those C. 16 times as heavier; that D. 16 times as heavy; those试题答案 在线课程 【答案】A 【解析】 试题分析:考查倍数表达法。句意:氧原子是氢原子重量的16倍。is 16...
百度试题 结果1 题目:The atomic weight of helium is ___ that of hydrogen. () A. heavier four times than B. four time heavier than C. than four times heavier D. four times heavier than 相关知识点: 试题来源: 解析 D 反馈 收藏
1The atomic weight of helium is ___ that of hydrogen.A.heavier four times thanB.four time heavier thanC.than four times heavierD.four times heavier than 2 The atomic weight of helium is ___ that of hydrogen. A.heavier four times thanB.four time heavier thanC.than four times heavie...
翻译结果1复制译文编辑译文朗读译文返回顶部 的氦原子的重量是___的氢 翻译结果2复制译文编辑译文朗读译文返回顶部 氦原子重量是 ___ 的氢 翻译结果3复制译文编辑译文朗读译文返回顶部 氦原子重量是 ___ 的氢 翻译结果4复制译文编辑译文朗读译文返回顶部 氦原子重量的的...
With the exception of hydrogen, no atomic weight is less than 2x, if the atomic weight of oxygen is taken as the standard. There is, accordingly, some justification for treating the atomic weights of helium, boron, carbon, nitrogen, oxygen, and fluorine as normal and that of hydrogen as ...
Theatomicweightofheliumisfourtimesheavierthanthatofhydrogen. 氦的原子量比氢的原子量重三倍。 Inrollingbearingthestartingfrictionisabouttwicetherunningfriction. 滚动轴承的启动摩擦比它的运转摩擦大一倍。减少了n-1/n或者减少到 1/n有如下四种说法: decreaseby3times decreasebyafactorof3 decrease3times 3times...
The atomic weight of an atom, or the molecular weight of a molecule, is its mass relative to that ofa___ atom. This is essentially equal to the number of protons plus neutrons that the atom or molecule contains. A oxygen B hydrogen C helium D carbon 相关知识点: 试题来源: 解析 B ...
A radioactive isotope of hydrogen whose nucleus has one proton and two neutrons and whose atomic mass is about 3. Tritium is rare in nature but can be made artificially in nuclear reactions. It is used in thermonuclear weapons and sometimes as a tracer. See more athydrogen. ...
The atomic weight of an atom, or the molecular weight of a molecule, is its mass relative to that of a(n) ___ atom. This is essentially equal to the number of protons plus neutrons that the atom or molecule contains.的答案是什么.用刷刷题APP,拍照搜索