45. Which the following is TRUE according to the text?

　　A. Thirty one percent of the parents keep watching on their children’s Facebook accounts.

　　B. Forty eight percent agree to review the social media profiles of job candidates.

　　C. Eighty two percent say it isn’t appropriate to upload photos at work.

　　D. Seventy six percent believe it is acceptable to be friends with employee,

　　46. What was the writer’s attitude towards the result of survey?

　　A. Defensive.

　　B. Critical.

　　C. Objective.

　　D. Doubtful

　　E

　　Against the supposition (猜想)that forest fires in Alaska, Canada and Siberia warm the climate, scientists have discovered that cooling may occur in areas where burnt trees allow more snow to mirror more sunlight into space.

　　This finding suggests that taking steps to prevent northern forest fires to limit the release of greenhouse gases may warm the climate in northern regions. Usually large fires destroyed forests in these areas over the past decade. Scientists predict that with climate warming, fires may occur more frequently over the next several centuries as a result of a longer fire season. Sunlight taken in by the earth tends to cause warming, while heat mirrored back into space tends to cause cooling.

　　This is the first study to analyze all aspects of how northern fires influence climate. Earlier studies by other scientists have suggested that fires in northern regions speed up climate warming because greenhouse gases from burning trees and plants are released into the atmosphere and thus trap heat.

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