GRE考试

根据网考网考试中心的统计分析，以下试题在2018/12/17日GRE考试习题练习中，答错率较高，为：37%
【单选题】 According to the explanation given in the passage, which of the following causes superbubbles to gradually assume the shape of a chimney
A．(A) The gravitational attraction of supernovas adjacent to the region of the chimney' s formation
B．(B) The effect of entropy on the relative abundance of hot interior gas within the superbubble
C．(C) A chemical reaction involving ionized trace ions at the heart of the superbubble
D．(D) A tendency toward coalescence in the gases that contribute to the formation of the superbubble
E．(E) A natural buoyancy of the superbubble, which causes the chimney to stretch and become a gaseous conduit

网考网参考答案：E，答错率：37%
网考网试题解析：
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