下列物质混入食品中,食用后会导致食物中毒的是 [ ]
A.NaCl
B.NaNO2
C.Na2CO3
D.CH3COOH
答案:B
单项选择。
Mrs Green is _____ mother. She loves them very much. [ ]
A. Lucy and Lily
B. Lucy's and Lily
C. Lucy's and Lily's
D. Lucy and Lily's
轧机()是指轧机辊缝值产生单位距离变化所需轧制力的增量值。