题干

2007年2月,中国首条“生态马路”在上海复兴路隧道建成,它运用了“光触媒”技术,在路面涂上一种光催化剂涂料,可将汽车尾气中45%的NO和CO转化成N2和CO2。下列对此反应的叙述中正确的是(  ).

A:使用光催化剂不改变反应速率

B:使用光催化剂能增大NO的转化率

C:升高温度能加快反应速率

D:改变压强对反应速率无影响

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答案(点此获取答案解析)

C

同类题3

阅读下面的文言文,完成下列小题。

    李石,字子坚,辽阳人,贞懿皇后弟也。石敦厚寡言,而器识过人。天会二年,授世袭谋克,为行军猛安。睿宗为右副元帅,引置军中,属之宗弼。拜参知政事。阿琐杀同知中都留守蒲察沙离只,遣使奉表东京,而群臣多劝世宗幸上京者。石奏曰:“正隆【注】远在江、淮,寇盗蜂起,万姓引领东向,宜因此时直赴中都,据腹心以号令天下,万世之业也。惟陛下无牵于众惑。”上意遂决,即日启行。

    安化军节度使徒单子温,平章政事合喜之侄也,赃滥不法,石即劾奏之。方石奏事,宰相下殿立,俟良久。既退,宰相或问石奏事何久,石正色曰:“正为天下奸污未尽诛耳。”闻者悚然。石司宪既久,年浸高。上表乞骸骨,以太保致仕。十六年,薨。

    石以勋戚久处腹心之寄内廷献替外罕得闻观其劾奏徒单子温退答宰臣之问气岸宜有不能堪者。时论得失半之,亦岂以是耶?旧史载其少贫,贞懿后周之,不受,曰:“国家方急用人,正宜自勉,何患乎贫。”后感泣曰:“汝苟能此,吾复何忧。”史又称其未贵,人有慢之者,及为相,其人以事见石,惶恐。石曰:“吾岂念旧恶者。”待之弥厚。

    山东、河南军民交恶,争田不绝。有司谓兵为国根本,姑宜假借。石持不可,曰:“兵民一也,孰轻孰重?国家所恃以立者纪纲耳,纪纲不明,故下敢轻冒。惟当明其疆理,示以法禁,使之无争,是为长久之术。”趣有司按问,自是军民之争遂息。北京民曹贵谋反,大理议廷中,谓贵等阴谋久不能发,罪止论斩。石是之。又议从坐,久不能决。石曰:“罪疑惟轻。”入,详奏其状,上从之,缘坐皆免死。北鄙岁警,朝廷欲发民穿深堑以御之。石曰:“不可。古筑长城备北,徒耗民力,无益于事。北俗无定,居出没不常,惟当以德柔之。若徒深堑,必当置戍,而塞北多风沙,曾未期年,堑已平矣。不可疲中国有用之力,为此无益。”议遂寝。

【注】正隆:金国海陵王的年号。

同类题4

通读下面短文, 掌握其大意, 然后在每小题所给的四个选项中, 选出一个最佳答案, 并将答题卡上对应的选项涂黑。

    My parents are busy with their work every day. You can't see there is love 1 them. They don't act in the romantic(浪漫的)2that I read in books or I see on TV.

    One day, while Mom was sewing(缝) a quilt,I 3 beside her. “Mom, I have a question,” I said after a while.

    “What?” she asked.

    “Is there love between you and Dad?” I asked her in a very low voice.

    She stopped sewing and 4 her head. Then she bowed her head and went on sewing.

    I thought I had hurt her. At last I heard my mother say, “Susan, look at this thread(线). Sometimes it appears, but most of it disappears in the quilt. It makes the quilt5. If life is a quilt, then love should be a thread. It can hardly be seen, but it's 6 there.”

    I couldn't understand her 7 the next spring. My father suddenly got sick. Mom had to stay with him in the hospital for a month.

    After they 8, my mother helped my father walk slowly down the country road every day. My father had never been so gentle.

    “Dad, how are you 9 now?” I asked him one day. “Susan, don't worry about me,” he said. “I just like walking with your Mom.”

     Once I thought 10 meant flowers, gifts and sweet kisses. But from this experience, I understand that it is just a thread in the quilt of our life . It is inside, making life strong and warm.