问题 单项选择题

下列说法不正确的是( )。

A.火灾高于中性面时,由正烟囱效应产生的空气流动能够使烟气流进竖井

B.火灾烟气的高温对人和物都可产生不良影响,如使建筑构件和金属丧失其强度、损害建筑结构、对人的灼伤、对呼吸的影响等

C.在建筑火灾中,驱动力包括室内外温差引起的烟囱效应、燃烧气体的浮力和膨胀力、风的影响、通风系统风机的影响、电梯的活塞效应等

D.在火灾中,由于毒性造成人员伤亡的罪魁祸首是CO,火灾中约有一半的人员死亡是由它造成的,另一半由直接烧伤、爆炸压力及其他有毒气体引起

答案

参考答案:A

解析: 下列说法正确的是:火灾烟气的高温对人和物都可产生不良影响,如使建筑构件和金属丧失其强度、损害建筑结构、对人的灼伤、对呼吸的影响等;在建筑火灾中,驱动力包括室内外温差引起的烟囱效应、燃烧气体的浮力和膨胀力、风的影响、通风系统风机的影响、电梯的活塞效应等;在火灾中,由于毒性造成人员伤亡的罪魁祸首是CO,火灾中约有一半的人员死亡是由它造成的,另一半由直接烧伤、爆炸压力及其他有毒气体引起。

阅读理解

Online shoppers would rather receive an offer for a product or service than make their own offer 3 according to a study led by a Michigan State University scholar that has implications for the fast-growing e-commerce industry. The findings may come as a surprise given that shopping online is an anonymous(匿名的)process that seemingly can give consumers more confidence to drive a hard bargain,said Don Conlon ,Professor of Management in MSU’s Broad College of Business.

But the study found that participants who made their own offers were less successful in sealing the deal and ,when they were successful? worried they overpaid Many shoppers found the process of researching an offer to be a hassle. “ Americans are very busy,and it’s less time-consuming to be the one receiving the offer rather than the one proposing the offer  ” Conlon said. u People tend to be happier when they’re in the receiver role. ”

Online spending in the United States is expected to jump 45 percent in the next four years, from $ 226 billion this year to $ 327 billion in 2017,according to Forrester Research Inc. Nevertheless, researches into this prosperous market remain largely focused on the strategies of companies, rather than those o£ shoppers. Conlons study is ,obviously, a rare exception.

Conlon got the idea for the study after considering the difference between two popular sites for hotels and airline flights, priceline.com, which takes bids, and hotwire.com ,which provides offers. Using these two models ,Conlon and his fellow researchers conducted a series of experiments with more than 850 people who were charged with booking a fictional hotel room and acquiring a fictional antique car. Not only did participants prefer to receive bids, Conlon said ,but they also secured more deals in that receiver role. Further ,when they had to make the bids ,they were left more mentally taxed and regretful.

From an industry perspective,putting customers in the receiver role may help fill more hotel rooms and airplane seats. “If you’re a business with a lot of products3 ” Conlon said,“you may want to be the one making the offers. ” However, when selling single items, such as an antique car, accepting bids may be a better option since that typically drives up the price, he said.

小题1:What can we learn from Para. 1?

A.The result of the study gives customers more confidence.

B.Scholars aren’t surprised at the findings of the study.

C.Online shoppers don’t bargain as much as expected.

D.E-commerce industry drives more hard bargains.小题2:It can be concluded from Conlon’s experiments that______.

A.online shopping is time-consuming

B.given prices help promote online sales

C.online businesses provide a lot of products

D.receiving offers makes online shoppers regretful小题3:The underlined word “taxed” in Para. 4 probably means______.

A.burdened

B.numbed

C.relieved

D.challenged小题4:The passage is mainly about______.

A.the big advantages of online shopping

B.the rapid development of online shopping

C.online shoppers’ preference for taking offers

D.online companies strategies to improve service

单项选择题