阿摩線上測驗
61. What is true of healthy bones?
(A) They are always being rebuilt.
(B) They slowly become bent.
(C) They gradually grow porous.
(D) They are rarely broken down.
答案：登入後查看
統計： A(216), B(36), C(55), D(53), E(0) #2085040
統計： A(216), B(36), C(55), D(53), E(0) #2085040
