题干

X元素的阳离子与Y元素的阴离子具有相同的电子层结构,下列叙述正确的是(  )

A:原子序数X<Y

B:原子半径X<Y

C:离子半径X>Y

D:原子最外层电子数X<Y

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答案(点此获取答案解析)

D

同类题1

七选五阅读,根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项多余选项。

Making Peace with Your Parents

    As a teen, you are going through big changes physically and mentally. Your interests are expanding(增加;扩大) ____.

    Here is the challenge: Kids need to explore the world in new ways, and parents need to protect them from the dangers that are all out in that world. These conflicts(冲突)can easily set off fireworks in otherwise calm house. Sometimes conflicts can't be avoided. But by paying attention to the building blocks of successful relationships, you can work towards making home a happy and healthy place for you and your parents.

    For instance, try to find a time to talk when your parents are not angry, tired, distracted , or hungry. A good time to talk is when you are all relaxed. Timing is everything. If the conversation begins to turn into an argument, you'd better calmly and coolly ask to stop the conversation----for now. ____ Listen to what your parents are saying, and repeat it back to them. This shows them that you're listening. ____.

    Respect is the building block of good communication. People who respect each other and care about each other's feelings can disagree without getting things ugly.

     ____How do you build trust? Trust comes by actually doing what you say you're going to do. Some teens find that doing fun activities with their parents can improve their relationships. Sometimes we forget that parents are more than rule-makers----they're interesting people who like to watch movies and go shopping----just like their teenagers!

    What do you do if you are trying your best, but your relationship with your parents continues to be rocky(难以维持的;不稳定的)? ____You can find supportive adults, such as a teacher or a coach, who can lead an ear.

    Remember you can only change your own behavior. Your parents are the only ones who can change theirs.

A. It also gives them a chance to clear things up if you're not on the same page.

B. You can pick it up again when everyone's more relaxed.

C. And then you will be able to accept what your parents say.

D. Faced with the challenge, children don't know what to do.

E. You are more likely to get along with your parents and have more independence if your parents believe in you.

F. And your desire to take control of your own life is growing.

G. You may consider seeking outside help.

同类题2

阅读下文,回答相关问题。

     【甲】余幼时即嗜学。家贫,无从致书以观,每假借于藏书之家,手自笔录,计日以还。天大寒,砚冰坚,手指不可屈伸,弗之怠。录毕,走送之,不敢稍逾约。以是人多以书假余,余因得遍观群书。既加冠,益慕圣贤之道,又患无砚师、名人与游,尝趋百里外,从乡之先达执经叩问。先达德隆望尊,门人弟子填其室,未尝稍降辞色。余立侍左右,援疑质理,俯身倾耳以请;或遇其叱咄,色愈恭,礼愈至,不敢出一言以复;俟其欣悦,则又请焉。故余虽愚,卒获有所闻。

     【乙】年二十,不好学,游荡无度,或以为痴。尝得瓜果,辄进叔母任氏①。任氏曰:“《孝经》云:‘三牲之养,犹为不孝②。’汝今年余二十,目不存教,心不入道③,无以慰我。”因叹曰:“昔孟母三徙以成仁,曾父烹豕以存教,岂我居不卜④邻,教有所阙⑤,何尔鲁钝之甚也!修身笃学,自汝得之,于我何有!”因对之流涕。谧乃感激,就乡人席坦受书,勤力不怠。
      居贫,躬身稼穑,带经⑥而农,遂博综典籍⑦百家之言。沉静寡欲,始有高尚之志,以著述为务,自号玄晏先生。著《礼乐》、《圣真》之论。

                                                                                                                                                          (选自《晋书·皇甫谧传》)
      注释①叔母任氏:指抚养他的任姓叔母。②三牲之养,犹为不孝:意为即使每天给父母吃牛、羊、猪(三牲)肉,仍称不上是孝子。③道:正道。④卜:此指选择。⑤阙:同“缺”。⑥经:此指儒家经典著作。⑦博综典籍:博览儒家经典著作,