Jay forty yuan for his new football.[ ]
A. pays
B. takes
C. costs
D. spends
答案:A
下列各组植物中,生活环境和繁殖方式最相似的是
A.墙藓、肾蕨
B.水绵、水稻
C.海带、雪松
D.白菜、紫菜
氯化聚乙烯(颗粒状)