单项选择题

The chickens Eijkman noticed in the hospital yard______.

A．couldn't digest the huskless rice
B．proved beriberi is transmitted by germs
C．were later cooked for the patients' food
D．were suffering from vitamin deficiency

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热门试题

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

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