Dyslexia refers to children with normal intelligence, no obvious physical impairment, but the reading performance that is significantly lower than two grades of children of the same age. According to the above definitions, Which of the following are dyslexic:. ['Xiao Bing is five years old and cannot speak yet, and he is not interested in picture books like other children.', 'The fifth-grader is lively and active, and his Chinese score remains at the second-grade level, but his mathematics often gets full marks.', 'Xiaohua should have entered the second grade. His Chinese teacher thought that his literacy was inadequate, and he was afraid he would not be able to follow the work.', 'Xiaohua had a fever. After healing, she had vision sequelae. She was nine years old. She was not literate, let alone reading.']