冷冻熟食品应表面彻底解冻后经充分加热方可食用。
参考答案：错
— Hello, may I speak to Mr. Smith?
— Sorry, he isn't in. He _____ the office. [ ]
A. has been to
B. has gone to
C. has been away
下列哪项不引起高排血量心力衰竭
A．严重贫血B．甲状腺功能亢进C．脚气病D．动静脉瘘E．二尖瓣关闭不全
