下列有关分子的叙述正确的是( )
A.一切物质都是由分子构成的
B.分子是保持物质物理性质的最小粒子
C.同种分子的化学性质相同
D.在化学变化中分子本身没有发生改变
答案:C
There is a possibility that these hens could be frightened and lay fewer eggs, ____ a sudden loud noise. [ ]
A. would there be
B. should there be
C. there was
D. there having been
罗格列酮可能导致的不良反应是()
A.体重减轻
B.腹胀、肠鸣音亢进
C.肝功能异常和水肿
D.白细胞计数减少
E.红人综合征