题干

2016年1月29日《科技日报》报道:科学家首次将从空气捕获的二氧化碳用氢气将其转化为甲醇,同时有水生成.该研究即可除去大气中的温室气体二氧化碳,生成的甲醇还能作为汽油的替代燃料.二氧化碳转化成甲醇的过程中,一个关键的因素是找到合适的均相催化剂.此次研究人员开发出在高温下不会分解的金属钌催化剂,稳定性好,可重复使用.
上一题 下一题 0.0难度 选择题 更新时间:2018-07-20 04:16:12

答案(点此获取答案解析)

同类题1

阅读下面的文言文,完成后面题。

    郝处俊,安州安陆人。甫十岁而孤,故吏归千缣赗之,已能让不受。及长,好学,嗜《汉书》,崖略暗诵。贞观中,第进士,解褐著作佐郎,袭父爵。兄弟友睦,事诸舅谨甚。召拜太子司议郎,累迁吏部侍郎。高丽叛,诏李勣为浿江道大总管,处俊副之.师入虏境,未阵,贼遽至,举军危骇。处俊方据胡床,体胖,安餐不顾,密畀料精锐击之,虏却,众壮其谋。入拜东台侍郎。时浮屠卢伽逸多治丹,曰“可以续年”。高宗欲遂饵之,处俊谏曰:“修短固有命,异方之剂,安得轻服哉? 昔先帝诏浮屠那罗迩娑寐案其方书为秘剂,取灵花怪石,历岁乃能就。先帝饵之,俄而大渐,上医不知所为,群臣请显戮其人,议者以为取笑夷狄,故法不得行。前鉴不远,惟陛下深察。”帝纳其言。

    上元初,帝观酺翔鸾阁,时赤县与太常音技分东西朋,帝诏雍王贤主东,周王显主西,因以角胜,处俊曰:“礼所以示童子无诳者,恐其欺诈之心生也。二王春秋少,意操未定,乃公朋造党使相夸,非所以导仁义,示雍和也。”帝遽止,叹曰:“处俊远识,非众臣所逮。”帝多疾,欲逊位武后,处俊谏曰:“昔魏文帝著令帝崩不许皇后临朝今陛下奈何欲身传位天后乎天下者非陛下之天下正应谨守宗庙传之子孙不宜持国与人以丧厥家。”事遂沮。开耀元年卒,年七十五。帝哀叹其忠,举哀光顺门,祭以少牢,赙绢布八百段、米粟八百石,诏百官赴哭,官庀葬事。子北叟固辞,未听。裴炎为白帝曰:“处俊阽死,诿臣曰:‘生无益于国,死无烦费,凡诏赐,愿一罢之。’”帝闻恻然,答其意,止膊物而已。

    处俊资约素,土木形骸,然临事敢言,自秉政,在帝前议论谆谆,必傅经义,凡所规献,得大臣体。

(节选自《新唐书·郝处俊传》)

同类题3

完形填空

    I believe I had the perfect life. Because I was about to 1 my high school, and on my way to college, I had great friends and a loving family. There was nothing 2. But I spoke too soon.

    It was around 9:25 a. m. that I heard the news that would 3 my life forever. My brother Zach had been in a car accident. He fought for five days before he 4. That day, I became an only child. I felt extremely 5.

    After Zach's death, I found6 in food. I ate, then I slept, then I ate again. I couldn't cry. I could hardly feel anything, and I was 7. I stopped building relationships for fear that they would end just as 8 as Zach's life. Also, I became nervous about any potentially 9 situations-driving late at night-but I couldn't express this fear of life 10 I wanted to be strong for my parents. I saw my parents' 11 worse than mine because of the losing of their son. I didn't want them to 12 me. I also experienced a lot of 13, because I was angry about why the sadness had happened to me, and I never  14from this emotion.

    Now, it has been nearly five years since Zach's death. I don't 15 life anymore: I fact it bravely. I 16 my friendships and began socializing more. I even 17 Zach's story with people around me, although my new friends met him they know about Zach.

    One lesson I learned from losing my brother was never to be 18 to say, “I love you.” I loved my brother, but it was too late to 19 it loudly. The last time I remember telling my brother I loved him was when he was when he was dying. Don't make this 20 like me.