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
