题目

—I have been working at learning English for a month but I haven’t improved it much. —_______. Rome wasn’t built in a day. A. It’s up to you.    B. It’s a deal.          C. It all depends.    D. Take your time. 答案：D关于吸烟的危害不正确的是（ ）A．烟雾会抑制气管和支气管内表面的黏膜上纤毛运动，使痰液不能及时排出，降低了呼吸道的净化作用B．吸烟者易患慢性支气管炎、肺癌等疾病C．青少年吸烟，呼吸道黏膜易受损伤D．烟雾有利于肺活量的增加