—____do you want?
—Let me have five kilos.[ ]
A. How much
B. How many
C. What
D. Which
答案:A
无壁空洞最常见于()
A.周围性肺癌
B.干酪性肺炎
C.肺转移瘤
D.肺脓肿
E.浸润性肺结核
胶凝材料用于配制混凝土的()等活性矿物掺合料的总称。
A.水泥
B.磨细矿渣粉
C.石粉
D.硅粉
E.粉煤灰