单杆双作用活塞缸差动连接时，活塞杆直径减小，推力（），速度（）。

15岁男性，于半月前突然惊叫一声，倒在地上，双眼上翻，四肢抽搐，面色青紫，历时约5分钟逐渐清醒，醒后未述不适。5年前曾有类似发作一次。1周前脑电图检查为正常。神经系统检查无异常。

经服药半年一直未发作而自行停止服药。停药1周后。今晨开始频繁发作，因一直意识不清而送来急诊。为了控制发作而又安全，最好首选（）。

A.苯妥英钠缓慢静脉注射

B.硫喷妥钠缓慢静脉注射

C.安定缓慢静脉注射

D.10%水合氯醛保留灌肠

E.副醛保留灌肠

先天性巨结肠的辅助检查包括

A．钡灌肠 

B．直肠肛管测压 

C．直肠指诊 

D．直肠活检神经节细胞减少或缺如 

E．直肠肛管肌电图检查

Marie Claire Magazine is one of the top women’s health, beauty and  fashion magazines in the world It has over 14 million readers all over the world．Maire Magazine is published in 32 countries including France, the Untied States ,Australia, China, the United Kingdom, Russia ,Spain Italy and many other nations.

Marie Claire Magazine has stood by its motto"More than a Pretty Face" since Jean Prouvost created it in France in1937. It was soon released every Wednesday and was an immediate success. Unfortunately, because of World War n, it stopped printing in 1940. But it b began in  again in 1954 as a monthly publication（出版物)instead of a weekly one.

The magazine has provided women throughout the world with information on health ,struggles and life stories of women. The magazine also focuses on current affairs all women would be interested in .It also has a part that specifically answers readers' questions.

The magazine discusses all of the latest and hottest things in clothing and accessories（首饰）．It also provides its readers with shopping information to help find the best deals for the latest fashions.

The cover of Marie Claire Magazine has been graced（使增光）by many famous faces ,Although it is aimed at women, it broke new ground in 2003. The US publication featured a  man一Tom Cruise on its cover for the first time．Marie Claire Magazine has continued to be a pioneer in the magazine industry.

小题1:When was Marie Claire Magazine created?

A． In 1937.

B． In 1940.

C． In 1954.

D． In 2003.小题2:Marie Claire Magazine includes sections on                .

①health   ②fashion     ③first aid          ④current affairs

⑤babies   ⑥shopping   ⑦women's life stories ⑧readers' questions

A．①②③④⑤⑥

B．②③④⑤⑥⑦

C．②③⑤⑥⑦⑧

D．①②④⑥⑦⑧小题3:According to the passage，Marie Claire Magazine________.

A．pays a lot of attention to readers's responses

B．has been a monthly magazine since 1937

C．often has Tom Cruise on its cover

D．changed its boss in 1954小题4:What do we know about Marie Claire Magazine？

A．It is a local European magazine.

B． It never refers to hot social problems.

C． It contains beautiful pictures and useful articles.

D． It has more readers than any other magazine of the same kind

矿物蜡

保尔和其他人为什么要修一条通向森林的铁路？