根及根茎类药材一般在（）采收。A、春末夏初 B、开花前或果实未_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

根及根茎类药材一般在（）采收。

A、春末夏初

B、开花前或果实未成熟前

C、植株充分生长，茎叶茂盛时

D、秋冬季

答案

参考答案：D

选择题

______ around the Water Cube, we were then taken to see the Beijing National Stadium, known as the Bird's Nest.

A. Having shown
B. To be shown
C. Having been shown
D. To show

单项选择题

内墙涂料宣选用()。

A．聚醋酸乙烯乳液涂料

B．苯乙烯-丙烯酸酯乳液涂料

C．合成树脂乳液砂壁状涂料

D．聚氨酯系涂料