题干

科研人员设想用如图所示装置生产硫酸,下列说法正确的是

A:a为正极,b为负极

B:生产过程中H+向a电极区域运动

C:电子从b极向a极移动

D:负极反应式为:

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答案(点此获取答案解析)

D

同类题1

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。选项中有两项为多余选项。

    Eating healthy 100% of the time can seem like a near impossible goal. But along with consistent exercise, healthy eating will make you feel better, give you more energy, and help you perform better in your workouts. ____

    Here are some tricks to make healthy eating easy:

    ● ____

    Protein is what keeps you full, fuels your muscles, and helps you keep a strong and slim figure. Starting your day out with around 30 grams of protein will not only help get you through the morning without feeling hunger pains, it will also help you get less desires for sugar and carbs(碳水化合物)later in the day.

    ●Make veggies a main part of every meal

    ____ You'll find that you might actually start to like vegetables, and your body will start to want them because of how good they make you feel after eating them.

    ●Eat whole foods whenever possible

    Simply focus on avoiding processed foods and include as many whole foods as possible in your diet. ____ But once you discover how food is supposed to taste, eating healthy will become much more natural to you.

    ●Don't deny yourself your favorite foods

    ____ Because it'll cause you to feel bitter, more often leading to a binge(大吃)eating session. So if you're working out and keeping active on a regular basis, allowing yourself a few small treats every once in a while will not only make you happier, it will also make it more likely that you'll stick with healthy eating in the long run.

A. So want exactly are whole foods?

B. It may take a little to get used to

C. And it doesn't have to be that difficult

D. Limit them, but don't cut them out altogether

E. There are so many good ones to choose from

F. Eat a protein-packed breakfast every morning

G. Make them a main part of every meal, at least two thirds of your plate as often as possible

同类题5

阅读下面文章,完成小题。

寒门贵子,贵在奋斗

    ①古人云:“自古寒门出贵子,从来纨绔少伟男。”在当今社会,这样的观点也许有些片面,但它对于当今处于寒门的青年来说确实起到了一定的鼓励作用。

    ②那么,谁才是今天社会中的“贵子”?

    ③“贵”并不意味着一定要升官发财,也不意味着必须拥有多么高的社会地位,“贵”代表的是人生进步的可能性以及实现人生价值的机会。富二代、官二代无疑符合传统意义上的“贵”,但如果没有一技之长,不能凭借自身本领干事创业,所谓“贵”也不过停留在人生的浅表。相反,白手起家的寒门青年,凭借自身努力打拼出一片天地,创造了属于自己乃至整个社会的价值,“贵子”的称谓自然当之无愧。

    ④寒门贵子的成功很大程度上与他拥有的社会信任和社会支持力量相关。在价值多元化、传播渠道扁平化的今天,“贵子”的内涵有了更为丰富的面向,同时,网络也为寒门青年走向成功提供了强大的社会支持力量。一位网名为“搬砖小伟”的湖北青年石神伟,凭借一系列自制的高难度健身视频,在短视频分享平台上吸引了超过百万粉丝。这位寒门青年从留守儿童、网瘾少年一路走来,用健身不断磨练和改变自己,传递着积极进取、拼搏向上的正能量,感动了无数网友。今天,许多像“搬砖小伟”这样寒门出身的“网红”,借助网络实现了自身的价值,也为社会进步传递着正能量。有人感慨,小伟的坚韧、低调和朴素,是这个时代的奢侈品,他是真正属于今天的“寒门贵子”。

    ⑤当今社会,家庭出身、教育背景和工作平台确实影响着一个人的成长路径。但寒门贵子的诞生,在于自己的打拼,一篇名叫《寒门贵子》的文章中,有这样一句话:“我们大部分人都不是出身豪门的,我们都要靠自己!所以你要相信:命运给你一个比别人低的起点是想告诉你,让你用你的一生去奋斗出一个绝地反击的故事。”这并不是鸡汤,而是说出了一个更为关键的问题:在今天这样一个充满无限可能的时代,寒门能否出贵子,很大程度上并不是一个关于“命运”的话题,而是一个关于“奋斗”的故事。

    ⑥由此看来,努力奋斗成就寒门贵子。

(选自2017年5月4日《人民日报》,有删改)