GRE考试

根据网考网考试中心的统计分析，以下试题在2019/4/29日GRE考试习题练习中，答错率较高，为：90%
【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、The gravitational attraction of supernovas adjacent to the region of the chimney’s formation
B、The effect of entropy on the relative abundance of hot interior gas within the superbubble
C、
A、chemical reaction involving ionized trace ions at the heart of the superbubble
D、
A、tendency toward coalescence in the gases that contribute to the formation of the superbubble
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：90%
网考网试题解析：
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