伤寒带菌者的细菌一般存在于（）
A.小肠
B.结肠
C.胆囊
D.肝
E.脾
参考答案：C
生活“三废”是指()
A．垃圾、废水、污物
B．废气、粪便、污物
C．垃圾、污水、粪便
D．废渣、废水、污物
______the telephone number several times, but he couldn’t learn it by heart.
A Having been told B. He had been told . C. Although he had been told. D. Having told
