食具常用的物理消毒法是（）
A.漂白粉消毒法
B.新洁乐灭消毒法
C.煮沸消毒法
D.红外线消毒法
参考答案：C
Tom studies_______, but his brother_______ studies.[ ]
A. hard; hard
B. hardly; hardly
C. hard; hardly
D. hardly; hard
