单项选择题

Deficiencies of the various vitamins______.

A．cause identical diseases
B．are no; serious except in the case of vitamin C
C．cause different diseases
D．are often caused by scurvy
<上一题 目录 下一题>
热门 试题

单项选择题
What the last paragraph tells us is the author's ______.
A．detailed analysis of the ways of raising poultry in Bangladesh
B．great appreciation of the development of poultry industry in Bangladesh
C．critical view on the development of the poultry industry in Bangladesh
D．practical suggestion for kite improvement of the poultry industry in Bangladesh
单项选择题
According to the author, in factory, vegetable food______.
A．is easy for chickens to digest
B．is insufficient for the needs of poultry
C．is fully utilized in meat and egg production
D．is inefficiently converted into meat and eggs
相关试题