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SectionB Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A),B),C) and D). You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre. Passage One Questions 52 t0 56 are based-on the following passage. Headlines have bannered the sad news about American education for years: "Johnny Can't Read"; "Johnny Can't Count"; "Johnny Can't Write"...Are youngsters in other industrialized countries doing any better? Yes, in many ways they are, and there's one big reason: they work hard. The consequences are sobering. Students in the U.S. now enter the job market with inferior skills. Once the unquestioned champion in industrial research, America is watching its lead dwindle. Some experts go so far as to suggest that failings in education put the nation in danger of becoming a second-class economic power. Whether or not that's the case is a key element in a bubbling debate over intemational competitiveness. Consider just these few examples of how American students are falling behind: When Japanese teenagers finish the 12th grade, they have the equivalent of three to four more years of school than U.S. high school graduates do. Stanford's Thomas Rohlen, a leading expert on Japan, says half of them know as much as the average U.S. college graduates. Nine of 10 Japanese get high school diplomas. But nearly a quarter of America's teenagers drop out sending one million untrained youngsters into the job market eveU year. The problem would be worse, some experts say with a straight face; if so many teenagers didn't stay in school they could take driver's education and get a driver’s license. For years, foreigners have outclassed young Americans in academic knowledge, and this week sees still another indictment (谴责 ) of U.S. education: new details on how thousands of 12th graders in selected countries did on a 1982 algebra test given by the Intemational Association for Evaluation of Educational Achievement. China's Hong Kong ranked first, barely ahead of Japan. The U.S. finished 14th among the 15 countries and areas, and ahead of Thailand. and behind Hungary. In a United Nations survey of what students in nine countries know about foreign cultures, the U.S. comes in next to last. One test of American 12-year-olds shows 20 percent unable to locate even their own nation on a world map. "Our students lag behind, and it doesn't bode (预示 ) well for our country," says Herbert Walberg, a comparative education expert for the University of Illinois in Chicago. "Fifty-five percent of America's jobs involve information processing. If we don't have good, solid skills in language, geography, math and science, we'II be at a severe disadvantage." 52.American newspapers have carried the sad news about American education that _ .
A.
Johnny can't read or write
B.
many Amencan students can't find a job
C.
American youngsters do not work hard
D.
many American young people are illiterates
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【判断题】我国的经济实力与美国相比差距太大,与美国打经贸站打不起。
A.
正确
B.
错误
【简答题】有一根粗细均匀的电阻丝,当两端加上 2V 电压时通过其中的电流为 4A ,现将电阻丝均匀地拉长,然后两端加上 1V 电压,这时通过它的电流为 0 . 5A 。由此可知,这根电阻丝已被均匀地拉长为原长的 ______ 倍。
【多选题】按刀具的工艺用途来分,常用的车刀有哪些?( )
A.
外圆车刀
B.
内孔车刀
C.
螺纹车刀
D.
切槽刀
【单选题】下列关于硝酸的说法不正确的是(  )
A.
. 浓硝酸是一种易挥发的液体混合物
B.
. 浓硝酸 在空气中敞口放置,因吸收水蒸气而浓度减小
C.
. 浓硝酸不稳定,易分解生成二氧化氮、氧气和水
D.
. 常温下,浓硝酸常保存在棕色试剂瓶中
【单选题】下列关于浓硝酸的说法 不 正确的是
A.
易挥发
B.
保存在棕色试剂瓶中
C.
受热易分解
D.
常温下不能与铜反应
【单选题】柳州市某施工企业前往武汉购买光缆,运回柳州的公司仓库时聘请货车司机,为其购买意外伤害险花费100元,该项费用属于( )。
A.
危险作业意外伤害保险
B.
材料运杂费
C.
人工费
D.
运输保险费
【多选题】下列关于试剂保存说法正确的是(   )
A.
易燃品和剧毒品应单独保存。
B.
氨水和盐酸等挥发性药品可以与其他试剂一同保存在试剂橱中。
C.
见光易分解的试剂应当放在棕色瓶中或用黑色的纸套好,贮存在黑暗的地方。
D.
过氧化氢、高氯酸都须要避光保存。
【多选题】下列关于毒麻品保存及使用说法正确的是()
A.
专药专用,专人负责
B.
有入有出,具有详细使用记录。防止丢失。
C.
试剂配制后明确标明配置时间、量,防止误用。
D.
放置毒麻品柜。要有明确标识。
E.
进出有记录,双人双锁,视频监控。
【单选题】下列关于Al、Fe、Cu的说法正确的是
A.
三种金属单质放置在空气中均只生成氧化物
B.
保存Fe 2 (SO 4 ) 3 溶液时需要加入铁钉
C.
无需另选试剂就可以鉴别浓度均为0.1 mol·L - 1 的三种金属的硫酸盐
D.
三种金属的活泼性:Al>Cu>Fe
【单选题】化学试剂存放必须安全、正确.下列关于试剂保存的说法不合理的是(  )
A.
白磷易自燃,必须存放于冷水中
B.
氢氧化钠溶液易和空气中的二氧化碳反应,所以细口瓶上的玻璃瓶塞必须塞紧
C.
量筒是用来量取液体体积的仪器,不能用于试剂的存放
D.
盐酸、硝酸均易挥发,必须密封保存
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