B.Because someone has put secrets about past life on Mars there.
C.Because past life has been found in other deltas on Mars.
D.Because some people are said to have already seen life marks there.
答案:A 细节理解题。由原文最后一句可直接找到答案。
. Which of the following statements is NOT true according to the passage?
A.The Noachan epoch was a wet and warm era.
B.The lake might have existed 3 .4 billion years.
C.The discovery can' t fully prove that the Mars once hosted life.
D.The lake traces prove that there exists life on Mars now.
答案:D
推理判断题。由第一段内容可知火星上湖岸线的发现只是增加了人们发现亿万年前火星上曾经存在生命证据的可能性,但并不能推出火星上现在有生命。
阅读下列材料,从每题所给的选项中选出最佳选项。体裁:说明文 话题:异国风情 词数:660 时间:7′
When you think of Victorian style homes, you probably imagine it as a Queen Anne home, complete with wonderful trim(饰物)painted in a contrasting color and stained glass windows.Victorian homes were built to leave a deep impression on others, and they are still impressive today.If you have a chance to visit one Victorian style home, you will find the following typical characteristics in the place you are visiting:
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