题干

已知:H2O2是一种强氧化剂。Mg­H2O2电池可用于驱动无人驾驶的潜航器。该电池以海水为电解质溶液,示意图如图所示。该电池工作时,下列说法不正确的是(   )

A:Mg电极是该电池的负极

B:H2O2在石墨电极上发生氧化反应

C:该装置能将化学能转化为电能

D:溶液中Cl-向Mg电极移动

上一题 下一题 0.0难度 选择题 更新时间:2020-02-11 09:21:49

答案(点此获取答案解析)

B

同类题2

   The teacher stood before his class and was going to hand out the final exam papers. “I know how  1   you have all worked to prepare for this test,” he said. “And because I know you can do it well, I am willing to offer a B to anyone who would  2  not to take the test. ”
   Many students jumped up to   3   the teacher and left the classroom.  The teacher looked at the   4  students and said, “Does anyone else want to get a B? This is your last   5 . ” Two more students decided to go.     Seven students remained.  The teacher then handed out the  6   .  There were only three sentences typed on the paper: Congratulations! You have just   7   an A in this class.  Keep believing in yourself.     I never had a teacher like that, but I think it is a test  8   any teacher could and should give.  Students who are not   9   in what they have learned are B students at best(充其量). The same is   10   in real life.  The A students are those who believe in what they are doing because they have   11   both successes and failures.  They have learned life’s lessons, either from normal education   12  from events in their lives, and have become   13   people.      Scientists say that by the age of eight, 80% of what we believe about ourselves has already been formed.  You are a big kid now, and you   14   that  you have some limits (限制).  However, there is   15   you can’t do or learn or be.  Sir Edmund Hillary, the first person to reach the summit of Mount Everest said, “It’s not the mountain we conquer(克服) but ourselves. ”

同类题3

围绕“让人民群众在每一个司法案件中感受到公平正义”的专题学习,同学王某制作了两张学习卡片:

卡片一:权威声音

对错案发现一起、纠正一起,再审改判刑事实件6747件,其中依法纠正呼格吉勒图案、聂树斌索等重大冤错案件39件78人,并依法予以国家赔偿。

落实罪刑法定、证据裁判、疑罪从无等原则,对2943名公诉案件被告人和1931名自诉案件被告人依法宣告无罪,确保无罪的人不受刑事追究、有罪的人受到公正惩罚。

认真落实***主席特赦令和全国人大常委会决定,依法特赦罪犯31527人。

落实公开审判、法庭辩论等诉讼制度,切实保障当事人各项诉讼权利。

加强涉未成年人案件审判,完善社会调查、轻罪记录封存等机制,积极开展回访帮教工作,未成年人犯罪案件数量连续5年下降。

发放司法救助金26.7亿元,帮助无法获得有效赔偿的受害人摆脱生活困境,加强权利救济,传递司法温暖。

——摘自2018年最高人民法院工作报告


卡片二:典型案例

2017年5月2日,医生杨某劝阻在同一电梯内吸烟的段某某,二人发生言语争执。二人分开后,段某某心脏病发作猝死。段某某家人田某某将杨某告上郑州市金水区人民法院。法院一审判决杨某补偿田某某15000元,驳回田某某其他诉求。田某某不服,上诉至郑州市中级人民法院。

郑州市中级人民法院二审查明:杨某劝阻段某某在电梯内吸烟的行为未超出必要限度,属于正当劝阻行为。在劝阻过程中,杨某保持理性,平和劝阻,未与段某某发生肢体冲突和拉扯行为,也没有证据证明杨某对段某某进行过呵斥或有其他不与行为。段某某自身患有心脏疾病,未能控制自身情绪,发作心脏疾病不幸死亡。两者虽然时间上是先后发生,但并不存在法律上的因果关系。一审判决适用法律错误,不利于鼓励公民自觉制止不当吸烟行为,损害了社会公共利益。

郑州市中级人民法院作出二审判决:撤销一审判决,驳回田某某的诉讼请求。