TEXT D Helium is a gas that is lighter than air. It is the second lightest of all gases. (Only hydrogen is lighter.) Helium is inert, which means it will not react chemically with anything. It cannot burn. It has no color, odor, or taste. The first people who saw evidence of helium saw it as a bright yellow line in spectroscopes they aimed at the sun during the eclipse of 1868. They knew that they were seeing something new, and that the chemical element that caused the line in the spectroscope was unknown on earth. The unknown element was named helium, from the Greek word helios, meaning "sun". Later, in 1895, the same brilliant yellow line was seen coming from a Norwegian mineral which produces a little helium by its radioactivity. The line in the spectroscope was identified as caused by the gas helium. This element is the only one that was discovered off the earth before it was discovered in the earth. Almost all commercial helium is produced in the United States. The plants for separating helium from natural gas are in Texas, Kansas, and New Mexico. Most of the natural gas supplies are controlled by the government and administered by the United States Bureau of Mines. The government is interested in helium because the gas has military uses. Helium has been used for some time to inflate blimps, weather balloons, advertising balloons, and toy balloons. Helium is valuable for filling balloons because it does not burn, as hydrogen does. This prevents dangerous explosions. Recent uses of helium are far more important than any of these familiar uses. Now helium gas may be the cooling gas, or coolant, pumped through the reactors of some nuclear power plants to keep them from getting too hot. It is also used in electric arc welding because the gas does not combine with hot metal. helium is used, too, in rocket fuel tanks as a means of maintaining pressure during flight.

　　76. The chemical element helium is named from the Greek word which means _____.

　　A) light air

　　B) yellow line

　　C) sun

　　D) earth

　　77. Helium is valuable to nuclear power plants because it _____.

　　A) is lighter than air

　　B) may be used as a cooling gas

　　C) does not combine with hot objects

　　D) does not burn

　　TEXT E When there is a vacancy in a company, it is the job of the Personnel Manager and his department to manage the recruitment of a new employee. One way an organization can find staff for job vacancies is to recruit in company. Management can inform people of new appointment by means of the firms notice board or news bulletin. Another possibility is to ask for recommendations from departmental managers and supervisors. If it is necessary to recruit outside the company, the personnel department may use commercial and government employment offices or consultants. It may prefer to put its own advertisement in a newspaper or magazine. It is usual for an advertisement to give a short description of the job, conditions of work and salary, and to invite introductory letters from applicants. After studying these, management decides who receives an application form. In order to assess the applications, managers can work from a personnel specification such as Rodgers Seven-Point Plan. They do not choose applicants who do not have a good profile. For this reason, it is important that the application form requests clear information about such things as the applicants age, education, qualifications and work experience. It must also ask for references from other employers or people who know the applicant well. This information helps management to make a final decision on the number of applicants they can short-list for interview. The staff who hold an interview together are called an interview "panel". It is important that they know what information they need to get from the applicants. This comes from a careful reading of job descriptions, personnel specifications, and applications. To help the panel in their selection, some companies use an interview assessment form. This is used by the panel during the interview when each applicant is checked under the same point of the form. Many employers say that the success of a good business begins in the Personnel Managers office.

　　78. Which of the following means it NOT mentioned in the passage when recruiting staff outside the company?

　　A) Consultants.

　　B) Written examinations.

　　C) Own advertisements.

　　D) Government employment offices.

　　79. What is Rodger's Seven-Point Plan?

　　A) A recruitment advertisement.

　　B) A personnel specification.

　　C) A short description of the job.

　　D) A managerial appointment.

　　80. According to the passage, an interview assessment form is used by the panel to _____.

　　A) inform people of new appointments

　　B) ask for recommendations from managers

　　C) study the applicant's age and education

　　D) judge an applicant's performance during interviews