2015年职称英语考试理工类每日一练（第十五期）

单项选择题
1、 Language teachers often extract examples from grammar books.
A．pull out
B．repair
C．takes
D．dig
2、根据下列材料，请回答题
Avalanche and Its Safety
An avalanche is a sudden and rapid flow of snow, often mixed with air and water, down a mountainside. Avalanches are_____ (51) the biggest dangers in the mountains for both life and property.
All avalanches are caused by an over-burden of material, typically snowpack, that is too massive and unstable for the slope _____ (52) supports it. Determining the critical load, the amount of over-burden which is _____ (53) to cause an avalanche, _____ (54) a complex task involving the evaluation of a number of factors.
Terrain slopes flatter than 25 degrees or steeper than 60 degrees typically have a low (55) of avalanche. Snow does not _____ (56) significantly on steep slopes ; also, snow does not _____ (57) easily on fiat slopes. Human-triggered avalanches have the greatest incidence when the snow's angle of rest is _____ (58) 35 and 45 degrees; the critical angle, the angle at which the human incidence of avalanches is greatest, is 38 degrees. The rule of thumb is: A slope that is v(59) enough to hold snow but steep enough to ski has the potential to generate an avalanche, regardless of the angle. Additionally, avalanche risk increases with_____ (60) ; that is, the more a slope is disturbed by skiers, the more likely it is that an avalanche will occur. 
Due to the complexity of the subject, winter travelling in the backcountry is never 100% safe. Good avalanche safety is a continuous_____ (61) , including route selection and examination of the snowpack, weather _____ (62) , and human factors. Several well-known good habits can also v(63) the risk. If local authorities issue avalanche risk reports, they should be considered and all warnings should be paid (64) to. Never follow in the tracks of others without your own evaluations; snow conditions are almost certain to have changed since they were made. Observe the terrain and note obvious avalanche paths where plants are_____ (65) or damaged. Avoid travelling below others who might trigger an avalanche.
__________
A．among
B．on
C．at
D．with
3、 What were the effects of the decision she had made?
A．reasons
B．results
C．causes
D．bases
4、The weather was crisp and clear and you could see the mountains fifty miles away 
A．fresh
B．hot
C．heavy
D．windy 
5、He shifted his position a little in order to alleviate the pain in his leg. 
A．control
B．ease
C．experience
D．suffer 
6、 根据以下材料回答题：
Spam
Would you like to lose weight fast? Would you like to make $5,000 a month for your home? Yes or no, you are more likely to find such unsolicited offers flooding your E-mall inbox these days than ever before, along with a free trial for professional teeth whitening and a low-rate mortgage.
Such E-mail, best known by its pejorative appellation, spam, has been annoying Internet users for years. But in the last three months, Spare has been spiked.
Spam-watchers attribute the escalation to a combination of factors.
In a slumping economy, companies going out of business may be selling their lists of customer E-mail  addresses to pay off creditors.
Mailing tactics have also improved. Online marketers have always selected addresses from Web sites, but with the growth of sites like eBay, the online auction service where thousands of people post their E-mail  addresses, automated sweeps of the World Wide Web for E-mail addresses are obtaining more results.
Many now use "dictionary attacks," in which a computer automatically matches combinations of  thousands of common words and names with long lists of large domain names (amyfritz@yahoo. corn, amyfritz@hotmail, corn and so on) sends E-mail messages to all of them, much like telemarketers dialing numbers in sequence. As a result, even people who have made efforts to keep their E-mail addresses  private will find their mailboxes stuffed with suggestions on how to make money fast or reduce their debts  simply and easily.
Marketers worry that people who feel constantly assaulted by junk E-mail are less likely to trust any commercial communication by E-mails, even from businesses they might otherwise be happy to hear from, like a retailer alerting them to a sale on an item they are, interested in. To shield themselves fro junk E-mail, many Internet users have become increasingly wary of divulging their addresses.
Some mainstream marketers are already beginning to see the effects of resistance to junk E-mail. Only a year ago, advertisers were raving about the response rates to targeted E-mail, which could reach as high as 20 percent. But that number is falling fast. Still, critics say some online retailers with well-known brand names also contribute to the problem by automatically addin customers to an E-mail list unless they specifically ask to be kept off.
United Airlines, Amazon. com and Martha Stewart. com, among others, all require customers to uncheck the "yes" box on their Web site that asks if they would like to receive E-mail from them-or, in some cases, an unspecified list of advertising "partners" . Some times, it is not entirely clear that there is a choice involved.
The difficulty of defining Spam is one reason-efforts to pass federal legislation to stop it have foundered. Critics have compared junk E-mail to unsolicited faxes, which are illegal under a law that was passed when receiving a fax was quite expensive.

Spam is__________
A．a pejorative E-mail
B．an annoying E-mail
C．junk E-mail
D．air E-mail which gives advices
7、 The thief was finally captured two miles away from the village.
A．caught
B．killed
C．found
D．jailed
8、 The Foreign Service is a branch of the Department of State．
A．center
B．division
C．root
D．base
9、 His stomach felt hollow with fear.
A．sincere
B．respectful
C．empty
D．terrible
10、Climate Change: The Long Reach