下列化学肥料属于复合肥料的是 [ ]
A.尿素:CO( NH2)2
B.重过磷酸钙:Ca( H2PO4)2:
C.氯化钾:KCl
D.磷酸二氢铵:NH4H2PO4
答案:D
—Excuse me. I’m looking for Be the Best of Yourself.
—Sorry. The book you ask for______ out.
A.is selling
B.is sold
C.was selling
D.will be sold
药品批发企业的药品冷库的温度不得高于()
A.10℃
B.15℃
C.20℃
D.25℃
E.30℃