问题 选择题

设NA为阿伏伽德罗常数的数值,则下列说法中,正确的是

A.常温下,0.1mol碳酸钠晶体中含有的个数为0.1NA

B.标准状况下,11.2L苯含有C-H键数目为3NA

C.常温常压下,54 g重水(D2O)含水分子数为3NA

D.将NA个Cl2分子通入足量的水中,所转移的电子总数为NA

答案

A

题目分析:苯为液体,不适用于标准状况的气体摩尔体积,B错误;D2O的相对分子质量为20,54 g D2O的物质的量为2.7 mol,C错误;Cl2与H2O的反应为可逆反应,故NA个Cl2分子通入足量的水中,转移的电子总数小于NA,D错误。

阅读理解

B

When you’re lying on the white sands of the Mexican Riviera, the stresses(压力) of the world seem a million miles away. Hey, stop! This is no vacation-you have to finish something!

Here lies the problem for travel writer and tood critic(评论家),Edie Jarolim “I always loved traveling and always liked to eat, but it never occurred to me that I could make money doing both of those things,” Jarolim said. Now you can read her travel advice everywhere in Arts and Antiques, in Brides, or in one of her there books, The Complate Idiot’s Travel Guide to Mexican Beach Resarts.

……writing began some eight years ago. After getting a PhD in English in Canada, she took a

Test Frommer’s travel guides, passed it, and got the job. After working at Frommer’s, Jarolim worked

for a while at Rough Guides in London, then Fodor’s, where she fell so in love with a description of the Southwest of the U.S. that she moved there.

Now as a travel writer, she spends one-third of her year on the road. The rest of the time is spent completing her tasks and writing reviews of restaurants at home in Tucson, Arigona.

As adventurous as the job sounds, the hard part is fact-checking all the information. Sure, it’s great to write about a tourist attraction, but you’d better get the local(当地的)museum hours correct or you could really ruin someone’s vacation.

46. Which country does Jarolim live in now?

A.Mexico    B.The U.S.    C.The U.K.    D.Canada

47. What is most difficrlt for Jarolim?

A.Working in different places to collect information

B.Checking all the facts to be written in the guides

C.Finishing her work as soon as possible

D.Passing a test to write travel guides

48. What do we know about Jarllim from the text?

A.She is successful in her job

B.She finds her life full of stresses

C.She spends half of her time traveling

D.She is especially interested in museums

49. What would be the best title for the text?

A.Adventures in Travel Writing

B.Working as a Food Critic

C.Travel Guides on the Market

D.Vacationing for a Living

选择题