问题 选择题

下列粒子中属于原子,且具有稳定结构的是:

答案

 

题目分析:原子中质子数等于核外电子数,稳定结构为最外层8电子或2电子的结构,故符合题意的为C 

写作题

书面表达。|
     假如你是李华,你在杂志Panorama上读到以下广告:
Don't you want a better world for you and your children?
GREEN PLANET
Then why not join Association(协会) For Environmental Protection
Meetings informing you about what's happening in the world
Talks given
Materials, mailed to members, with uptodate reports, maps and fact files
MEMBERSHIP FEE $ 30之后你想加入这一组织。请你给该组织写
一封信,了解以下细节,并提出你对活动的建议。

meetings多久举行一次,地点
talks专家还是会员主讲
materials是否额外收费
membership fee对学生是否优惠
注意:
1. 词数:100左右;
2. 参考词汇:优惠的会员费 reduced membership fee 额外收费 extra charge
3. 信的开头和结尾已为你写好,不计入总词数。
Dear Sir/ Madam,
     I'm writing to you with regard to your advertisement published in the magazine “Panorama”. _____
_____________________________________________________________________________
     I am looking forward to hearing from you at your earliest convenience.
                                                                                                        Yours faithfully,
                                                                                                               Li Hua
单项选择题