豇豆属于下列（）类型的茎。
A.攀援茎
B.缠绕茎
C.匍匐茎
D.直立茎
参考答案：B
Will you please tell us _______? [ ]
A. how can we use it
B. how could we use it
C. how we can use it
D. how we could use it
请说出唐代和宋代河北历史上有名的瓷窑？
