题目内容
（请给出正确答案）
A.divided by the product of the assets’ standard deviations of returns.
B.multiplied by the product of the assets’ variances of returns.
C.multiplied by the product of the assets’ standard deviations of returns.
D.divided by the product of the assets’ variances of returns.
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On a recent field trip to theKalahari Desert, a team of researchers learn a lot more about honey badgers(獾). The team employeda local wildlife expert, Kitso Khama, to help them locate and follow thebadgers across the desert. Their main aim was to study the badgers' movementsand behavior. as discreetly(谨慎地) as possible, without frightening them away or causing them to changetheir natu-ral behavior. They also planned to trap a few and study them closeup before releasing them. In view of the animal's reputation, this wassomething that even Khama was reluctant to do.
"The problem with honeybadgers is they are naturally curious animals, especially when they seesomething new," he says. "That, combined with their unpredictablenature, can be a dangerous mix-ture. If they sense you have food, for example,they won't be shy about coming right up to you for something to eat. They'reactually quite sociable creatures around humans, but as soon as they feel theymight be in danger, they can becomeextremely vicious(凶恶的). Fortunately this is rare, butit does happen. "
The research confirmed manythings that were already known. As expected, honey badgers ate any crea-turesthey could catch and kill. Even poisonous snakes, feared and avoided by mostother animals, were not safe from them The researchers were surprised, however,by the animal's fondness for local melons, probably because of their high watercontent. Preciously researchers thought that the animal got all of its liquidrequire-ments from its prey（猎物）. The team also learnt that, contrary to previous research findings, thebadgers oc-casionally formed loose family groups. They were also able toconfirm certain results from previous research,including the fact that femalebadgers never socialized with each other.
Following some of the malebadgers was a challenge, since they can cover large distances in a short spaceof time. Some hunting territories cover more than 500 square kilometers.Although, they seem happy to share these territories with other males, thereare occasional fights over an important food source, and male badgers can be asaggressive towards each other as they are towards other spe-cies.
As the badgers becameaccustomed to the presence of people, it gave the team the chance to get upclose to them without being the subject of the animal's curiosity-or sudden aggression.The badgers' eating patterns, which had been disrupted returned, to normal. Italso allowed the team to observe more closely some of the other creatures thatform. working associations with the honey badg-er, as these seemed to adopt thebadgers' relaxed attitude when near humans.
Why did the wildlife experts visit the Kalahari Desert？
A.To find where honey badgers live
B.To observe how honey badgers behave
C.To catch some honey badgers for food
D.To find out why honey badgers have a bad reputation
3.Read the following passage and choose the best answer to each question. Interview: for or against? It often happens that a number of applicants with almost identical qualifications and experience all apply for the same position. In their educational background, special skills and work experience, there is little, if anything, to choose between half a dozen candidates. How then does the employer make a choice? Usually on the basis of an interview? There are many arguments for and against the interview as a selection procedure. The main argument against it is that it results in a wholly subjective decision. As often as not, employers do not choose the best candidate, they choose the candidate who makes a good first impression on them. Some employers, of course, reply to this argument by saying that they have become so experienced in interviewing staff that they are able to make a sound assessment of each candidate’s likely performance. The main argument in favor of the interview—and it is, perhaps, a good argument—is that an employer is concerned not only with a candidate’s ability, but with the suitability of his or her personality for the particular work situation. Many employers, for example, will overlook occasional inefficiencies from their secretary provided she has a pleasant personality. It is perhaps true to say, therefore, that the real purpose of an interview is not to assess the assessable aspects of each candidate but to make a guess at the more intangible things, such as personality, character and social ability. Unfortunately, both for the employers and applicants for jobs, there are many people of great ability who simply do not interview well. There are also, of course, people who interview extremely well, but are later found to be very unsatisfactory employees. Candidates who interview well tend to be quietly confident, but never boastful; direct and straightforward in their questions and answers; cheerful and friendly, but never over-familiar; and sincerely enthusiastic and optimistic. Candidates who interview badly tend to be at either end of the spectrum of human behavior. They are either very shy or over-confident. They show either a lack of enthusiasm or an excess of it. They either talk too little or never stop talking. They are either over-polite or rudely abrupt. 1 We can infer from the passage that an employer might tolerate the secretary’s occasional mistakes, if the latter is ____ . A. direct B. cheerful C. shy D. capable 2 What is the author’s attitude toward the interview as a selection procedure? A. Unclear. B. Negative. C. Objective. D. Indifferent. 3 According to the passage, people argue over the interview as a selection procedure mainly because they have A. different selection procedures B. different purposes in interviews C. different standards for competence D. different experiences 4 The purpose of the last paragraph is to indicate ____ in interviews. A. a link between success in interview and personality B. connections between work abilities and personality C. differences in interview experience D. differences in personal behavior 5 A well-performed candidate shows the following qualities EXCEPT ___. A. friendly B. over-optimistic C. straightforward D. confident
A、dividing the covariance of the security with the market by the variance of the market.
B、dividing the correlation of the security with the market by the variance of the market.
C、dividing the variance of the market by the covariance of the security with the market.
D、dividing the variance of the market by the correlation of the security with the market.
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