题干

化学实验中的安全意识是重要的科学素养。在实验中,为防止下列情况发生,采取的措施错误的是:

C:当蒸发到剩有少量液体时,停止加热,利用余热将液体蒸干

D:实验室若不慎发生电线短路引起火灾,我们应立即用水灭火

A:制蒸馏水时,为防止烧瓶内产生暴沸现象,应先向烧瓶中加入几片碎瓷片

B:在用实验装置制取和检验的实验中,若尾气污染空气,一定要吸收尾气

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D

同类题2

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

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    Arriving in Sydney on his own from India, my husband, Rashid, stayed in a hotel for a short time while looking for a house for me and our children.

    During the first week of his stay, he went out one day to do some shopping. He came back in the late afternoon to discover that his suitcase was gone. He was extremely worried as the suitcase had all his important papers, including his passport(护照).

    He reported the case to the police and then sat there, lost and lonely in strange city, thinking of the terrible troubles of getting all the paperwork organized again from a distant country while trying to settle down in a new one.

    Late in the evening, the phone rang. It was a stranger. He was trying to pronounce my husband's name and was asking him a lot of questions. Then he said they had found a pile of papers in their trash can(垃圾桶) that had been left out on the footpath.

    My husband rushed to their home to find a kind family holding all his papers and documents(文件). Their young daughter had gone to the trash can and found a pile of unfamiliar papers. Her parents had carefully sorted them out, although they had found mainly foreign addresses on most of the documents. At last they had seen a half-written letter in the pile in which my husband had given his new telephone number to a friend.

    That family not only restored the important documents to us that day but also restored our faith and trust in people. We still remember their kindness and often send a warm wish their way.