1. 答案
C
解析
推理判断题。结合文章第三段和第四段的信息可知,Prosocial behavior是一种有利于社会或者他人的行为,因此C项正确。
2. 答案
A
解析
细节理解题。从文章倒数第二段The cellphone directly evokes feelings of connectivity to others ...可知,A项正确。
3. 答案
A
解析
细节理解题。从文章最后一段this difference in connectedness可知,答案为A项。
4. 答案
C
解析
推理判断题。从文章最后一段可知,脸谱网用户跟他人的联系感没有那么紧密。因此推断C项正确。
There’s no good evidence to prove that life exists or ever existed on other planets beyond the earth.
Hundreds of biologists, geologists, chemists and astronomers have conducted research on astrobiology(天体生物学). That’s because there is plenty to think about before we actually find alien life. Scientists tend to be more confident than ever that life does exist out in the universe.
In 1996 Onstott dug up rocks a mile below the surface, and he extracted(提取) bacteria that were living cheerfully in harsh conditions completely isolated from the rest of the biosphere (生物圈). Onstott’s discovery is just one of dozens that established the existence of so-called extremophiles(嗜极生物), bacteria and other forms of life thriving in such hostile places. Life can deal with a wider range of conditions.
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