专升本考试

【单选题】Why so few people are left-handed ______.
A．has nothing to do with heredity
B．is not known by scientists
C．has little to do with the working of their brains
D．is that left-handers are mainly twins
网考网参考答案：B
网考网解析：
本题为细节推断题。在第五段中提到“Perhaps the greatest puzzle of all is not why some people are left-handed, but rather why so few are.”(也许最让人迷惑不解的并不是为什么有些人是左撇子，而是为什么他们的人数这么少。)，“puzzle (迷)”即“not known”。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>