维管束为周木型及外韧型,含晶纤维及油细胞的药材为( )
A.甘草B.姜黄C.天麻D.石菖蒲E.百部
参考答案:D
解析:[知识点] 根及根茎类中药——石菖蒲
Some Math problems are difficult for the students work out.
A.so, that
B.not, but
C.such, that
D.too, to
274 113 48 17 ( )
A.9
B.11
C.14
D.15