問題詳情
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.
(A) They are always being rebuilt.
(B) They slowly become bent.
(C) They gradually grow porous.
(D) They are rarely broken down.
參考答案
無參考答案
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