用纱布、棉花蘸取后用于皮肤或口、喉黏膜的液体制剂是（）。 A．泻下灌肠剂  B．含药

英国文官数目变化

1985年英国文官比1984年减少（）。

A．25万人

B．2.5万人

C．2 500人

D．2.5千人

女，63岁，腰背痛，全身无力，体重减轻1个月，症状加重伴低热1周。X线片显示：腰椎、肋骨、颅骨均有圆形的溶骨样病损，考虑为骨髓瘤，在血液化验中哪一条支持诊断（）。

A.血沉加快

B.尿本周蛋白（+）

C.血中白细胞计数升高

D.血中碱性磷酸酶升高

E.血中酸性磷酸酶升高

材料：

DNA分子的结构

“DNA分子的双螺旋结构”是学生学习的重点和难点。为了解决这一难点，在本节教学中，教师利用可拆卸的DNA模型教具，把模型建构贯穿于学习的全过程，加强学生的动手能力和对知识的理解。

（1）初步学习DNA分子的结构。教师通过三维动画展示DNA分子的结构层次．图解DNA分子双螺旋结构模型的基本要点。

（2）通过组装DNA模型，理解DNA分子的结构特点。教师先让学生观察桌面的DNA模型的小零件，猜测一下每一个零件分别代表什么结构。

大部分学生能够根据DNA分子结构模式图作出正确的判断。教师要求学生用桌面的DNA模型的小零件组装成脱氧核苷酸，组装好后，互相检查组装出来的模型最多共有多少种脱氧核苷酸。

学生相互检查，相互交流、纠正后得出“共有4种脱氧核苷酸”的结论。

教师再把学生分成小组，让各组把每个成员做的“核苷酸”连接成DNA。通过教师的提醒，学生进行自我检查和更正，进而加深对DNA分子结构特点的理解。

（3）通过观察、比较各组所做的DNA模型，总结DNA分子的共同性与特异性以及碱基数量关系。

问题：

该教学设计需要老师很强的课堂组织技能，课堂组织的目的是什么？

连到局域网上的节点计算机必需要安装（）硬件。

A．调制解调器

B．交换机

C．集线器

D．网络适配卡

Come on—Everybody’s doing it. That whispered message, half invitation and half forcing, is what most of us think of when we hear the words peer pressure. It usually leads to no good—drinking, drugs and casual sex. But in her new book Join the Club, Tina Rosenberg contends that peer pressure can also be a positive force through what she calls the social cure, in which organizations and officials use the power of group dynamics to help individuals improve their lives and possibly the word.

Rosenberg, the recipient of a Pulitzer Prize, offers a host of examples of the social cure in action: In South Carolina, a state-sponsored antismoking program called Rage Against the Haze sets out to make cigarettes uncool. In South Africa, an HIV-prevention initiative known as LoveLife recruits young people to promote safe sex among their peers.

The idea seems promising, and Rosenberg is a perceptive observer. Her critique of the lameness of many pubic-health campaigns is spot-on: they fail to mobilize peer pressure for healthy habits, and they demonstrate a seriously flawed understanding of psychology. "Dare to be different, please don’t smoke!" pleads one billboard campaign aimed at reducing smoking among teenagers teenagers, who desire nothing more than fitting in. Rosenberg argues convincingly that public-health advocates ought to take a page from advertisers, so skilled at applying peer pressure.

But on the general effectiveness of the social cure, Rosenberg is less persuasive. Join the Club is filled with too much irrelevant detail and not enough exploration of the social and biological factors that make peer pressure so powerful. The most glaring flaw of the social cure as it’s presented here is that it doesn’t work very well for very long. Rage Against the Haze failed once state funding was cut. Evidence that the LoveLife program produces lasting changes is limited and mixed.

There’s no doubt that our peer groups exert enormous influence on our behavior. An emerging body of research shows that positive health habits—as well as negative ones—spread through networks of friends via social communication. This is a subtle form of peer pressure: we unconsciously imitate the behavior we see every day.

Far less certain, however, is how successfully experts and bureaucrats can select our peer groups and steer their activities in virtuous directions. It’s like the teacher who breaks up the troublemakers in the back row by pairing them with better-behaved classmates. The tactic never really works. And that’s the problem with a social cure engineered from the outside: in the real world, as in school, we insist on choosing our own friends.

Rosenberg holds that public-health advocates should（）

A. recruit professional advertisers

B. learn from advertisers’ experience

C. stay away from commercial advertisers

D. recognize the limitations of advertisements