下列有关输血和献血的说法中,不正确的是( )
A:O型血的人能输入任何血型的血
B:安全输血应以输同型血为原则
C:一次献血200〜300毫升不影响健康
D:18〜55周岁的健康公民有无偿献血的义务
Shakespeare, who devoted himself to writing novels, plays and poems, ____ (consider) to be the greatest writer in the English language, even today.