猪苓粉末中可见
A.木栓细胞
B.厚壁细胞
C.菌丝
D.草酸钙结晶
E.淀粉粒
参考答案:C,D
---________ will your head teacher return from the USA?
---In two days.
A.How long
B.How soon
C.How often
D.How old
药害