将下列固体分别放入水中,不能区分的一组物质是( )
A.硫酸铜和硫酸铁
B.烧碱和硝酸铵
C.碳酸钙和碳酸钠
D.氯化钠和氯化钡
答案:D
Most film directors can have a proper ________ to public opinions on their films.[ ]
A. reaction
B. role
C. imagination
D. idea
停用肌松药后,哪一肌肉最早恢复()
A.腹肌
B.肋间肌
C.膈肌
D.肢体肌
E.颈部肌