单项选择题

A boy of nine who is" three years retarded" has a mental age of ______.

A．six
B．nine
C．twelve
D．three
<上一题 目录 下一题>
热门 试题

单项选择题
To work out a person's mental ratio, one must ______.
A．know his date of birth
B．give him a test
C．find out his mental age
D．know the relationship between his mental age with his chronological age
单项选择题
The expression a variety of tests (Line 1, Para. 3) means ______.
A．a large number of different tests
B．a large number of easy tests
C．a large number of similar tests
D．a large number of difficult tests
相关试题