Some children like _____ snowmen in winter. [ ]
A. make
B. making
C. having
D. to get
答案:B
下列关于浮选药剂用量的说法正确的是()。
A.捕收剂和起泡剂过小都会,跑煤
B.捕收剂起泡剂过小,会跑煤,而起泡剂不会
C.捕收剂和起泡剂过小都不会跑煤
D.起泡剂起泡剂过小,会跑煤,而捕收剂不会