单项选择题

After years of research, scientists have ______the virus that is responsible for the disease.

A．recognized
B．identified
C．guaranteed
D．notified
<上一题 目录 下一题>
热门 试题

单项选择题
The criminal was sentenced to prison for five years and was______ of political rights for two years.
A．excluded
B．deprived
C．disabled
D．gripped
单项选择题
The company formulated a package of______ for assessment of employees' performance.
A．thresholds
B．partitions
C．warrants
D．criteria
相关试题