筒状花冠
参考答案：
菊科管状花亚科植物中间的盘花是筒状花冠。是一种辐射对称，花瓣合生的小花。
It was in the lab___was taken charge of by our teacher____ they did the experiment.
A．which; that
B．where; which
C．which; where
D．that;where
真武汤中生姜的主要作用是（）
A.温散水气
B.和胃止呕
C.温肺止咳
D.温胃散寒
E.解表散寒
