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1B
P:more abundant in our galaxy than sun-like stars and have lifespans of hundreds of billions of years
C:red dwarf star systems may be more stable environments for the development of advanced life forms
加强结论->红矮星系有更适合孕育高级生命的环境
A.削弱
B.有关
C.有关
D.削弱
E..无关
剩下B,C
B比C更优,B有点像是重复结论,红矮星系要比其他星系更适合孕育生命,C则是单纯说红矮星系本身,没有跟太阳系或者其他星系比较
2C现象:planet's rotational speed
解释:Mercury's core is composed of lighter elements than previously thought+ may be made up of sulfur
加强
A.无关,但有可能也削弱,排除
B.无关
C.有关
D.无关,讨论的是成分,而不是液态还是固态
E.有关
剩下C,E
C比E更能加强,during formation of the universe有很多sulfur,比现在表面上有sulfur更能加强Mercury'的核可能是sulfur
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