单项选择题

Fresh fruit and vegetables______.

A．contain more vitamin C than any other food
B．decrease our resistance to colds
C．contain every kind of vitamin
D．increase our susceptibility to influenza

<上一题目录下一题>

热门试题

单项选择题

Western governments encourage the poultry industry in Asia because they regard it as an effective way to______.

A．boost their own exports
B．alleviate malnutrition in Asian countries
C．create job opportunities in Asian countries
D．promote the exports of Asian countries

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