烟机入口蝶伐为风（）阀；烟机冷却蒸汽调节阀为风（）阀，烟机密封蒸气调节并为风（）阀。
参考答案：开、关、关
— Have you heard about that fire in the market?
— Yes, fortunately no one _____.[ ]
A. hurt
B. was hurt
C. has hurt
D. had been hurt
—Who is ________ English teacher?
— Well, it’s Mrs. Green. She teaches ________ English very well.
A．you; we
B．you; ours
C．your; us
D．your; our
