试题与答案

(6分)化学兴趣小组的同学用如下图所示装置做中和反应实验,请按要求回答问题。

题型:填空题

题目:

(6分)化学兴趣小组的同学用如下图所示装置做中和反应实验,请按要求回答问题。

(1)向盛有氢氧化钠溶液的烧杯中滴入酚酞溶液,溶液变为红色,此时溶液的pH    7(填“>”或“<”或“=”),用胶头滴管吸取盐酸逐滴加入烧杯中,并不断用玻璃棒搅拌,当溶液刚好由红色变成   色时,恰好完全中和,停止加入盐酸,该反应的化学方程式为     。 

(2)实验(1)中,某同学又多加了几滴盐酸,这时溶液显   性,此时溶液中的溶质为      

答案:

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A (9) of (10) and a more rapid and profound reduction of import tariffs would (11) of those Chinese consumers who would (12) imported products at lower prices. Second, a higher (13) into China would take away much upward pressure on the Renminbi and provide a true and lasting (14) to solving current global (15) . Indeed, even a modest (16) in the opening-up process would go a long way towards solving the problem.
The opening up of China’s markets to international competition should (17) deep reforms. Banks should be recapitalized, bad loans provisioned fully and state-owned companies’ runaway indebtedness (18) . Only when real progress in these areas is made should China begin to consider a reform to its (19) . Doing it any earlier would be highly (20) .

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国际货币基金组织(IMF)专家对过去几十年世界经济增长相关数据进行研究之后表示,中国经济发展对世界的影响不断增强,中国经济连续5年增长1%,就能够拉动世界经济增长0.4%。这说明                                                              [ ]

①我国经济增长迅速,综合国力不断增强

②中国已成为推动世界经济持续发展的重要力量

③中国已经步入发达国家行列

④世界经济的发展离不开中国

A.①②③

B.②③④

C.①②④

D.①③④

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