托福考试

根据网考网考试中心的统计分析，以下试题在2019/3/11日托福考试习题练习中，答错率较高，为：57%
【单选题】
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Why does the professor mention SiriusB、at the beginning of his lectureA．To introduce the topic of his lecture on white dwarfs.
B．To give a visual example of what he is discussing.
C．To explain the relation between stars and their companions.
D．To compare and contrast two stages in the formation of stars.

网考网参考答案：B，答错率：57%
网考网试题解析：
[解析] 结构题 教授在说明白矮星的大小及亮度等一般特征之前先以天狼星为例进行了说明，因此B项是正确答案。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>