题目
A long – term study of 136 pairs of twins showed that ____.A. they lost a little ability to reason over the years.B. the only factor which declined over the years was their speed with which to perform mental tasks.C. their memory was not as good as it had once been.D. their minds became is not considered as they grew older.
A long – term study of 136 pairs of twins showed that ____.
A. they lost a little ability to reason over the years.
B. the only factor which declined over the years was their speed with which to perform mental tasks.
C. their memory was not as good as it had once been.
D. their minds became is not considered as they grew older.
题目解答
答案
B. the only factor which declined over the years was their speed with which to perform mental tasks.
解析
这道题考察的是对一段关于双胞胎长期研究的描述的理解。根据题干，研究对象是136对双胞胎，研究时间是长期的，研究内容是他们随年龄增长的智力变化。选项A、C、D都提到了智力的下降，但选项B特别指出，唯一下降的因素是执行心理任务的速度，这可能意味着其他智力因素没有显著变化。因此，选项B最符合题意。