单项选择题

Professor Laura believes that his research _________.

A．has been supported by many scientists
B．has a profound significance
C．has established a new theory on Vitamin Ｄ
D．has changed people's concept of skin cancer

<上一题目录下一题>

热门试题

单项选择题

According to Professor Laura, it would be safer from skin cancer ifyou _________.

A．wore sunglasses when you were out
B．stayed indoors most of the year
C．used sunscreen creams when you were in the sun
D．let yourself be exposed to the sun when the sunlight is not too strong

单项选择题

The phrase were subject to in Para. 5 means _________.

A．obey a law
B．were more resistant to a disease
C．were likely to suffer from an illness
D．were interested in a subject