医学科研道德的根本原则是()
A.献身医学
B.造福人类
C.团结同道
D.合理保密
E.严谨治学
参考答案:B
复合生态系统具有();()、可塑性、高产性、地带性和综合性等特征。
Many lifestyle patterns do such()great harm to health that they actually speed up ()weakening of the human body.
A.a;/
B./;the
C.a;the
D./;/