The nurse is assessing a pregnant woman in the clinic. In the course of the assessment, the nurse learns that this woman smokes one pack of cigarettes per day. The first step the nurse should take to help the woman stop smoking is to （）.

A．assess the client's readiness to stop.

B．suggest that the client reduce the daily number of cigarettes smoked by one-half.

C．provide the client with the telephone number of a formal smoking cessation program.

D．help the client develop a plan to stop.

请你设计实验证明酒精燃烧生成物是二氧化碳和水蒸气。

⑴答：将一只干冷的烧杯罩在酒精灯火焰的上方，发现___________________。证明有水生成。取下烧杯，迅速向烧杯内倒入少量的_________________，发现_________________，证明有二氧化碳生成。

⑵请写出酒精燃烧的文字表达式：__________________________________