现代护理学的基本概念是()
A．人
B．环境
C．健康
D．疾病
E．护理
参考答案：A, B, C, E
He knows _______ English but he has _____ English friends.
A．few; little
B．little; few
C．little; a few
D．a few; little
简要说明科学争鸣及其意义
