铝及铝合金管子堆放时,不得与铁、铜、不锈钢等金属管子接触,以防管子受到电化腐蚀。( )
参考答案:对
— ?
—It's cloudy.[ ]
A. How's the weather like
B. How's it going
C. What's the weather
D. How's the weather
引起肉毒中毒最多见的食品是
A.肉制品B.鱼制品C.自制发酵食品D.豆制品E.罐头食品