下列变化属于物理变化的是[ ]
A.食物腐烂
B.木材燃烧
C.汽油挥发
D.钢铁生锈
答案：C
—I think we should give a hand to the elderly when they fall onto the ground.
— ___________. Everyone needs help when they are in trouble.
A．Sorry, I can’t
B．Never mind
C． I don’t agree
D．I agree
阿米卡星属于
A．大环内酯类抗生素B．四环素类抗生素C．氨基糖苷类抗生素D．氯霉素类抗生素E．β-内酰胺类抗生素
