Basic Astronomy (id: 453e17ba6)

本题目来源于试卷: Basic Astronomy，类别为 美国物理杯赛(Physics Bowl)

[单选题]
17.13: According to currentc t oupluunw*nthw /)tq2* (62ly accepted theory, dark matter makes up appro6 z4r -i(x(73zsiz wzk ej4jncximatel zr-wj 6 zzxi(4cijns(e47 zk3y what percent of the Universe?

A. 5 %
B. 25 %
C. 50 %
D. 80 %
E. 99 %


参考答案:  B


本题详细解析: 暂无

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