单项选择题

A good mixed diet ______.

A．normally contains enough vitamins
B．still needs supplementing with vitamins
C．is suitable for religious fasting
D．is often difficult to arrange
<上一题 目录 下一题>
热门 试题

单项选择题
The chickens Eijkman noticed in the hospital yard ______.
A．couldn't digest the huskless rice
B．proved beri-beri is transmitted by germs
C．were later cooked for the patients' food
D．were suffering from vitamin deficiency
单项选择题
The disease'beri-beri' ______.
A．kills large numbers of western peoples
B．is a vitamin deficiency disease
C．is transmitted by diseased rice
D．can be caught from diseased chickens
相关试题