如果某公司固定资产的累计折旧为50万元，总固定资产为100万元，总折旧固定资产为80

旅游经济的运行是()的结果。

A．市场经济发展

B．旅游供求矛盾运动

C．游客推动

D．政府促进

MY Chinese friend is going to the US and he is nervous about what to talk about. “Talk about the weather,” is my advice.

“How are you?” is often followed by comments about the weather. “Nice day today.” “Cold/hot enough for you?” “Will it ever stop raining?” “Some winter we’re having.” “Can’t remember a winter/summer so cold/hot.” “Whew, it’s hot out there.”

These introductory statements are often followed by a long conversation entirely about weather conditions. Past, present and – with global warming – speculation (推测) about the future.

Our fascination with weather might seem silly, but the real purpose behind those endless discussions is small talk. Weather’s a safe topic of conversation. As a group, we Americans seem to enjoy chatting with those around us. Whenever we stand in line at the grocery store, we tend to engage in this sort of conversation with other people standing in line with us. If I were seated next to another American on any form of public transport, I’d expect both of us to make some harmless comment about the weather as a way of acknowledging (承认) each other’s presence (存在). At parties, the weather is a common topic, especially with those you are meeting for the first time.

In contrast we are taught to avoid certain topics like religion and politics. Weather is neutral (中性的); you don’t have to have an opinion about it, just make a statement of a fact. What is truly interesting is the fact that we can go on and on about it.

My Chinese friend has a hard time understanding why we put so much effort into this topic – and why I warn him about bringing up much more “interesting” subjects like salaries or how much something costs.

Sometimes it is tricky (复杂的) to wend (行走) one’s way through winding cultural roads, especially those that are never taught in books.

小题1:What does the writer suggest her Chinese friend should talk about with people in the US? (No more than two words)

小题2:Why do Americans enjoy talking to people around them about the weather, in writer’s opinion? (No more than ten words)

小题3:List four topics that people should avoid talking about in the US. ( No more than 5 words)

某日，黄某牵着狗在山坡上闲逛，偶遇平日与己不和的刘某，黄某即唆使其带的狗扑咬刘某，刘某警告黄某，黄某继续唆使狗扑咬刘某。刘某边抵挡边冲到黄某面前，拣起石块将其头部砸成轻伤，黄某见头上流血，慌忙逃走。从刑法理论上看，刘某的行为属于下列哪种情况( )

A．紧急避险

B．正当防卫

C．防卫过当

D．对象错误

挤压过程中，变形材料的温度是一个变化的量，产生温升的热量主要来自（）和（），挤压速度越快，产生的温升越（）（高/低）。