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著名物理学家霍金是“太空移民”理论的倡导者,他认为:“地球生命被某一灾难消灭的危险正以前所未有的速度与日俱增,如突如其来的全球变暖、核战争、基因病毒或其它危险。” 霍金的观点并不新颖,但我们必须承认他们的观察是正确的。与其他体积一样大小的星球相比,地球所拥有的适合居住的表面区域较小,可供我们居住的面积少得可怜。作者的主要观点是:
D.地球生命被某一灾难消灭的危险正以前所未有的速度与日俱增

A.地球所拥有的适合居住的表面区域太小,抵御毁灭性灾难的能力差
B.突如其来的全球变暖、核战争、基因病毒或其他危险威胁人类
C.如果人类不能及时移民至其他星球,难免会被某一灾难消灭

【参考答案】

A
解析:作者通过引述霍金的话表达了这样的观点:地球生命被某一灾难消灭的可能性正在与日俱增,抵御毁灭性灾难能力差,最后一句,作者总结说,地球适合居住的面积小。综合起来,就是说明地球适合居住面积小,抵御灾难能力差。B、D项是霍金言论的一个方面,C项属于无中生有,A项符合题意。
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A.B.
Notes:
juvenile
C.pleasurE.
B.returns.
C.sharE.