试题与答案

有一种自生氧防毒面具,其使用的生氧剂的主要成分是KO2.某研究小组取100g生氧

题型:问答题

题目:

有一种自生氧防毒面具,其使用的生氧剂的主要成分是KO2.某研究小组取100g生氧剂放入装置A中,加入足量水使之充分反应(4KO2+2H2O═4KOH+3O2↑),测定反应前后装置A的总质量.他们进行了三次实验,测定结果如下:

测定序号第1次第2次第3次平均值
反应前装置A总质量(g)400.1400.2399.7400.0
反应后装置A总质量(g)376.1376.1375.8376.0
请根据上述实验结果计算:(假设杂质不含钾元素且不与水反应)

(1)100g生氧剂与水反应生成的氧气质量;

(2)生氧剂中含钾元素的质量分数.

答案:

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James Shapiro follows his award-winning book on William Shakespeare, 1599, which came out in 2005, with an unlikely subject: an investigation into the old chestnut that Shakespeare wasn’t the man who wrote the works.

Most mainstream Shakespeareans stand aloof from it. But apparently the claims of Francis Bacon, Edward de Vere and Christopher Marlowe, among others, are on the rise. (46) An appetite for conspiracy theories, combined with a call for "balance" from some sectors of academe and the rise of the Internet has given the thing new life. Respectable audiences turn up to listen to lectures on it. The controversy is even taught at university level. "What difference does it make who wrote the plays" someone asked the author wearily. Mr. Shapiro (for whom Shakespeare was definitely the man) thinks it matters a lot, and by the end of this book, his readers will think so too.

The authorship controversy turns on two things., snobbery and the assumption that, in a literal way, you are what you write. How could an untutored, untravelled glover’s son from hickville, the argument goes, understand kings and courtiers, affairs of state, philosophy, law, music-let alone the noble art of falconry (47) Worse still, how could the business-minded, property-owning, moneylending materialist that emerges from the documentary scraps, be the same man as the poet of the plays

Mr. Shapiro teases out the cuhural prejudices, the historical blind spots, and above all the anachronism inherent in these questions. No one before the late 18th century had ever asked them, or thought to read the plays or sonnets for biographical insights. No one had even bothered to work out a chronology for them. (48) The idea that works of literature hold personal clues, or that--more grandly--writing is an expression and exploration of the self, is a relatively recent phenomenon.

Contested Will is dense with lives and stories and argument. It is also entertaining. The quest for the true claimant drove people mad. (49) Here are secrets and codes, an elaborate cipher-breaking machine, an obsession with graves and crazy adventures to find lost manuscripts. One man spent months dredging the River Severn. Mr. Shapiro himself turns sleuth, exposing as fraudulent a piece of evidence long thought to be genuine-one more hoax in the long history of Shakespearean wild goose chases.

(50) The Shakespeare that emerges is both simple and mysterious: a man of the theatre, who read, observed, listened and remembered. Beyond that is imagination, In essence, that’s what the book is about.

(49) Here are secrets and codes, an elaborate cipher-breaking machine, an obsession with graves and crazy adventures to find lost manuscripts

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