用方框中所给单词的适当形式填空,使短文正确、通顺、连贯。(每词限用一次。10分)

题型:填空题

问题:

用方框中所给单词的适当形式填空,使短文正确、通顺、连贯。(每词限用一次。10分)
come back, go out, pay back, say, find, last, return, lose, take, tell
One day, my good friend Tom put his wallet in his bag. He put his bag in the classroom and __1__ to the playground. When he __2__, he could not find his wallet. So he __3__ some of his classmates. Soon the whole class learned that Tom __4__ his wallet with a lot of money in it. He was sure that one of his classmates __5__ his wallet away, but no one returned it to him.
A few days later, he __6__ his wallet in his bag with only half of the money, together with a note. It _7__, “A thief, yes, but only 50 percent a thief!” A week later, some more money __8__ to Tom with another note saying, “Only 25 percent a thief now.” In the end, all Tom’s money was __9__ in this way. The __10_ note said, “I am 100 percent honest now!”
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题型:填空题

“大河小说”

题型:填空题

2013年7月6日我国与______正式签署了自由贸易协定,这是我国与欧洲大陆国家签署的首个自贸协定。

A.英国 

B.德国 

C.意大利 

D.瑞士

题型:填空题

(15分)甲醇(CH3OH)是一种重要的化工原料,广泛应用于化工生产,也可以直接用做燃料。已知

CH3OH(1) + O2(g) =" CO(g)" + 2H2O(g) ; Ha = -443.64 kJ·mol1

2CO (g) + O2(g) = 2CO2(g) ;  Hb =-566.0 kJ·mol1

(1)试写出CH3OH(1)在氧气中完全燃烧生成CO2和H2O(g)的热化学方程式:

                                                                            

(2)甲醇作为燃料,它的优点是燃烧时排放的污染物少,从而不仅能缓解能源紧张和温室效应的问题,还能改善大气质量。试利用(1)中的热化学方程式计算,完全燃烧20g甲醇,生成二氧化碳和水蒸汽时,放出的热量为         kJ ,生成的CO2气体标准状况下体积是               L

(3)科研人员新近开发出一种由甲醇和氧气以强碱做电解质溶液的新型手机电池,可使手机连续使用一个月才充一次电,据此回答下列问题:

甲醇在     极反应;电极反应式为                                           

(4)利用电池可实现电能向化学能转化。某同学设计了一种电解法制取Fe(OH)2的实验装置(如下图所示),通电后,溶液中产生大量的白色沉淀,且较长时间不变色。下列说法中正确的是          (填序号)

A.电源中的a一定为正极,b一定为负极

B.可以用NaCl溶液作为电解液

C.A、B两端都必须用铁作电极

D.阴极发生的反应是:2H+ + 2e→H2

若将所得Fe(OH)2沉淀暴露在空气中,其颜色变化是                       ,反应的化学方程式为                                                             

题型:填空题

可以通过农信银支付业务系统向七位行号的机构发起委托收款和托收承付业务。

题型:填空题

环境污染的基本特征是()

A.以下都是

B.污染物的多变性和综合作用

C.低浓度长期作用

D.对机体危害的复杂性

E.作用广泛性和途径多样性

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