阿摩線上測驗
62. What happens during osteoporosis?
(A) The bones change shape.
(B) The bones become spongy.
(C) The osteoblasts fill the bone with holes.
(D) The osteoclasts stop dissolving the bone.
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統計： A(28), B(157), C(106), D(42), E(0) #2085041
統計： A(28), B(157), C(106), D(42), E(0) #2085041
