問題詳情
27. According to modern ideas about phototropism in plants
(A) many densely-packed cells without an extracellular matrix.
(B) an epithelial origin.
(C) relatively few cells and a large amount of extracellular matrix
(D) a supporting material such as chondroitin sulfate
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增