蒸煮食品最易受苯并(a)芘的污染。( )
参考答案：错
解析： 烘烤和熏制食品最易受苯并(a)芘的污染。
—Are you going to take part in the speech contest?
—________ It's too good an opportunity to miss.[ ]
A. No problem!
B. That's for sure.
C. Why me?
D. Why bother?
泡沫产生器在日常运行中容易出现哪些故障?简述产生故障的原因及解决办法。
