孢菌素类抑制细菌的：（）。
A.蛋白质合成
B.核酸合成
C.胞浆膜通透性
D.细胞壁合成
参考答案：D
25．Children often form some bad habits, ____________remain with them as ling as they live.
A．some of them
B．some of which
C．any of them
D．any of which
健康人如何合理安排一日三餐？
