Danny _____ breakfast five times last week.[ ]
A. eat
B. eats
C. ate
D. eated
答案:C
2GF158M电除尘器电场内烟气最大流速是()烟气流经电场内最短时间是()。
下列属于膳食纤维的食物成分是()
A.水苏糖
B.果胶
C.糊精
D.β-胡萝卜素
E.海藻糖