吩噻嗪类抗精神病药中降压作用最强的是（） A.三氟拉嗪 B.氟奋乃静 C.奋乃静 D

2011年2月12日，国家广电总局发出通知，要求严格控制影视剧中的吸烟镜头，内容包括不得表现未成年人买烟、吸烟等将烟草与未成年人相联系的情节，不得出现有未成年人在场的吸烟镜头。据调查，我国未成年人吸烟与影视剧中的吸烟镜头误导有密切关系。影视剧中的吸烟行为往往与成熟、性感、魅力、时尚联系在一起，这对未成年人吸烟态度、观念、行为产生了潜移默化的影响，在某种程度上是未成年人尝试吸第一支烟的最重要的原因之一。

结合材料和所学知识，回答问题：

（1）国家广电总局此次禁烟令体现了对未成年人哪方面的保护？

________________________________________________________________________________

（2）结合材料和所学知识，谈谈广电总局为什么要严格控制影视剧中的吸烟镜头？

________________________________________________________________________________

（3）如果你的家人有吸烟的恶习，从加强自我保护的角度，你认为该怎么办？

________________________________________________________________________________

青藏高原的主要特征概括为

A．湿

B．热

C．低

D．高、寒

I usually doubt about any research that concludes that people are either happier or unhappier or more or less certain of themselves than they were 50 years ago.While any of these statements might be true, they are practically impossible to prove scientifically. Still, 1 was struck by a report which concluded that today’s children are significantly more anxious than children in the 1950s. In fact, the analysis showed, normal children between 9 and 17 have a higher level of anxiety today than children who were treated for mental illness 50 years ago.

Why are America’s kids so stressed? The report cites two main causes: increasing physical isolation (孤独) brought on by high divorce rates and less involvement in community, and a growing perception that the world is a more dangerous place.

Given that we can’t turn the clock back, adults can still do plenty to help the next generation to cope.

At the top of the list,nurturing (培育) is a better appreciation of the limits of individualism. No child is an island. Strengthening social ties helps build communities and protect individuals against stress.

To help kids build stronger connections with others, you can pull the plug on TVs and computers. Your family will thank you later.They will then have more time for face-to-face relationships, and they will get more sleep.

Limit the amount of virtual (虚拟的) violence your children are exposed to. It’s not just video games and movies; children see a lot of murder and crime on the local news.

Keep your expectations for your children reasonable. Many highly successful people never attended Harvard or Yale.

Make exercise part of your daily routine. It will help you deal with your own anxieties and provide a good model for your kids. Sometimes anxiety is unavoidable,but it doesn’t have to ruin your life.

小题1:What does the author thinks of the conclusion that people in America are unhappier than 50 years ago?

A．Surprising

B．Confusing

C．Illogical

D．Questionable小题2:What does the author mean by saying “ we can’t turn the clock back(Para. 3)?

A．It’s impossible to slow down the pace of the change.

B．The social reality children are facing cannot be changed.

C．Lessons learned from the past should not be forgotten.

D．It’s impossible to forget the past.小题3:According to an analysis, compared with normal children today, children 50 years ago __________.

A．were less isolated physically

B．were probably less self-centered

C．probably suffered less from anxiety

D．were considered less individualistic小题4:What is the first and most important thing parents should do to help their children?

A．To provide them with a safer environment.

B．To lower their expectations for them.

C．To get them more involved socially.

D．To set a good model for them to follow.小题5:What conclusion can be drawn from the passage?

A．Anxiety, though always unavoidable, can be coped with.

B．Children’s anxiety has been enormously exaggerated(夸大).

C．Children’s anxiety can be removed with more parental care.

D．Anxiety, if properly controlled, may help children become mature.

根据李白的《送友人》记载，李白的朋友是搭乘哪种交通工具离开的？

坐骨神经是混合神经，既有传入功能，又有传出功能。为研究可卡因对坐骨神经的麻痹顺序，研究人员用脊蛙（除去大脑的蛙）进行如下实验：（1）刺激趾尖和腹部皮肤，后肢均出现收缩现象；（2）将含有一定浓度的可卡因棉球放在坐骨神经上，刺激趾尖无反应，刺激腹部皮肤出现收缩现象；（3）间隔一段时间后，再刺激腹部皮肤，反应消失。请回答：

发生步骤1中两次收缩现象的结构基础，除效应器相同外，还有（）和（）也相同。