开展安全教育的同时还要提高学生应对安全事故的能力。比如：对学生进行溺水安全教育时，可

在比例尺1：2000000的地图上，图上1厘米表示实际距离______千米．

One day, when I was working as a psychologist in England, an adolescent boy showed up in my office. It was David. He kept walking up and down restlessly, his face pale, and his hands shaking slightly. His head teacher had referred him to me. "This boy has lost his family," he wrote. "He is understandably very sad and refuses to talk to others, and I'm very worried about him. Can you help?" '

I looked at David and showed him to a chair. How could I help him? There are problems psychology doesn't have the answer to, and which no words can describe. Sometimes the best thing one can do is to listen openly and sympathetically.

The first two times we met David didn't say a word. He sat there, only looking up to look at the children’s drawings on the wall behind me. I suggested we play a game of chess. He nodded. After that he played chess with me every Wednesday afternoon - in complete silence and without looking at me. It's not easy to cheat in chess, but I admit I made sure David won once or twice.

Usually, he arrived earlier than agreed, took the chess board and pieces from the shelf and began setting them up before I even got a chance to sit down. It seemed as if he enjoyed my company. But why did he never look at me?

"Perhaps he simply needs someone to share his pain with," I thought. "Perhaps he senses that I respect his suffering." Some months later, when we were playing chess, he looked up at me suddenly.

"It's your turn," he said.

After that day, David started talking. He got friends in school and joined a bicycle club. He wrote to me a few times about his biking with some friends, an d about his plan to get into university. Now he had really started to live his own life.

Maybe I gave David something. But I also learned that one - without any words – can reach out to another person. All it takes is a hug, a shoulder to cry' on, a friendly touch, and an ear that listens. 

小题1:When he first met the author, David________.

A．felt a little excited

B．walked energetically

C．looked a little nervous

D．showed up with his teacher小题2:As a psychologist, the author_______ .

A．was ready to listen to David

B．was skeptical about psychology

C．was able to describe David's problem

D．was sure of handling David's problem小题3:David enjoyed being with the author because he ______.

A．wanted to ask the author for advice

B．need to share sorrow with the author

C．liked the children's drawings in the office

D．beat the author many times in the chess game小题4:What can be inferred about David?

A．He recovered after months of treatment.

B．He liked biking before he lost his family.

C．He went into university soon after starting to talk.

D．He got friends in school before he met the author.小题5:What made David change?

A．His teacher's help.

B．The author's friendship.

C．His exchange of letters with the author.

D．The author's silent communication with him.

有如下类声明： class TestClass {int n;public:TestClass(int i=0):n(i){}void setValue(int n0); }; 下面关于setValue成员函数的实现中，正确的是( )。

A．TestClass::setValue(int n0){n=n0;)

B．void TestClass::setValue(int n0){n=n0;}

C．void setValue(int n0){n=n0;}

D．setValue(int n0){n=n0;}

关于细胞膜，叙述正确的有（）.

A.可为细胞的生命活动提供相对稳定的内环境

B.是具有选择性的半透膜

C.具有流动性和对称性

D.主要组分包括糖类

E.基本骨架是脂类分子排列行成的双分子层

票据行为内容的合法，与形成该票据关系的基础关系所涉及的行为是否合法无关。( )