单项选择题

Mental development of young children is impaired mainly by ______.

A．vitamin A deficiency
B．iron deficiency
C．iodine deficiency
D．protein-energy malnutrition
<上一题 目录 下一题>
热门 试题

单项选择题
The largest number of malnourished children live in ______.
A．Asia
B．Lain America
C．Europe
D．Africa
单项选择题
The subway, on which Toronto prides itself, was a laughable imitation of the real thing. What does the author mean by the real thing
A．A subway that is extremely clean and well illuminated.
B．A subway that has a magnificent look.
C．A subway littered with garbage and covered with spray paints.
D．A subway crowded with boisterous children.
相关试题