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1.For decades many scientists believed Mars could not support life because, even though there is ice on the planet, its atmosphere is so thin that any liquid water on its surface quickly evaporates. Then, methane gas was discovered in the Martian atmosphere. On Earth, such gas originates from bacteria and other organisms, and also from geologic processes, whereby gas emerges from the surface during volcanic activity. Since methane molecules cannot last long in the Martian atmosphere, and since there is no evidence of current active volcanism on Mars, it is likely that there is some microscopic life beneath the surface of the planet.
Which of the following would, if true, most seriously weaken the argument above?
A. Liquid water is required to support life.
B. Analysis of Martian soil has revealed no evidence of microscopic life.
C. Many extinct volcanoes have been identified on Mars.
D. Methane can be trapped in ice and then released upon thawing.
E. An abundance of methane would be harmful to many organisms.
2.Many industrial design specialists are reluctant to move to the remote rural headquarters of the Genetz company, so the company has had difficulty recruiting the best of them. After experimenting with transporting designers to a hotel at a centrally located airport for intense, two-day work meetings, Genetz now plans to close its headquarters and allow all professional staff, including the design specialists, to work from home and do the most important collaborative work at monthly airport-hotel meetings. This will allow Genetz to attract and retain better employees, and as a result boost the productivity of its designers.
The planned arrangements, if implemented, are most likely to boost the productivity of Genetz's professional staff if which of the following is true?
A. The new arrangements will result in significantly less labor time, on average, needed to complete design projects than under the previous arrangements.
B. Genetz has a smaller number of design specialists than the average for similar-sized firms in its field
C. Closing its headquarters will save Genetz money on rent and other building-related expenses.
D. A survey of Genetz specialists showed that some of them work while on plane journeys.
E. The hotel facilities at the airport hotel include faxing services and computers with high-speed Internet connections.
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发表于 2021-6-16 13:59:34
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