Shikata地衣红染色乙型肝炎表面抗原阳性物质的颜色是()
A.红色
B.紫色
C.蓝色
D.棕色
E.绿色
参考答案:D
John plays football _______, if not better than, David.
A.as well
B.as well as
C.so well
D.so well as
湿胶粒为什么要洗涤?