专八

单选题   What does the passage imply about a brown dwarf?.

A.It's bright.
B.It's not very big.
C.It's not a planet.
D.It's huge.

参考答案:B进入在线模考
本题考查对句意的理解。第一段第二句就提到科学家发现了a dark star,故排除A;第二段说Nemesis围绕太阳转,可见它是行星,故排除C;第六段提到,Nemesis是一颗矮行星——a star that neveraccumulated enough nlass,所以它并不大,故排除D。

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