[单项选择]Which of the following statements is true of dyslexia
a. It is a worldwide problem.
b. It is a regional problem.
c. It is a social problem.
d. It is a biological problem.
参考答案:A 答案解析:[听力原文]
Which of the following statements is true of dyslexia
[分析] 事实细节的找寻和判断。
第一段第二句便提到“The