15. Which of the following is closest to the center of a woody stem?
(A) vascular cambium
(B) primary phloem
(C)secondary pholem
(D) primary xylem E) secondary xylem

答案：登入後查看
統計： A(0), B(1), C(0), D(2), E(0) #3426524

詳解 (共 1 筆)

#6762329
題目解析 題目問的是「在一根木本植物的...
(共 921 字，隱藏中）
前往觀看
0
0