移栽白菜幼苗时，尽可能选在阴天或傍晚进行，并去掉一部分叶子，这样做是为了（） A

Caring for animals, tutoring kids, helping seniors: Volunteer hours are more than a graduation must, they are life lessons.

Vilma Sooknanan cleans cat cages, Max Carroll teaches children how to cook and Michael Rosenthal rolls wheelchairs at a hospital.

What does this have to do with high school education?

Everything.

The three – and almost all other South Florida high school students – have to go outside of the classroom to earn their diplomas, doing what schools call “community service”.

Broward public schools require 40 hours to graduate. Palm Beach County public schools require 20, and most private schools require at least that much.

The purpose: To give students the chance to explore a career and create a habit of volunteering.

“We hope that when they finish high school they’ll continue service,” says Mike Roland, student activities officer for the Broward School District.

About half of U.S. public schools require community service, according to a national study. Broward School Board member Bob Parks says encouraging community service has launched all kinds of new projects, including tutoring and food collections.

Sooknanan, a student at South Broward High School, is part of the Humane Society of Broward County’s volunteer program, which is so popular that even the waiting list is closed. Students work one four-hour shift a week for four months, and leave with 64 volunteer hours.

Sooknanan changes litter boxes and puts down fresh newspaper for about 100 cats.

Combined with her volunteer hours at beach cleanups and helping teachers at school, she’s well on her way toward 250 hours, which she hopes will catch the eye of Nova Southeastern University, where she wants to study marine biology.

Carroll, a junior student at South Plantation High, has connected with FLIPANY, a nonprofit organization that offers cheap physical activity and food to low-income families. He helps teach children about cooking and healthy eating.

“It has been a life-changing experience,” says Carroll, who is now leaning toward a career as a sports trainer. "I want to find a career encouraging people to lead a healthier lifestyle.”

(Note: Answer the questions or complete the statements in NO MORE THAN 15 WORDS.)

1. How many hours of community service are students required to do to graduate from most U.S. private schools?

2. Why do some U.S. schools require students to do community service to graduate?

3. The reason Sooknanan take up so many kinds of volunteer work is that ___________.

4. Volunteer work is popular in many high schools in the U.S., not only because it is a graduation must, but also because ___________ .

患者男性，45岁，因胸痛伴恶心、呕吐2小时来院急诊。患者于2小时前搬重物时突然感到胸骨后疼痛，压榨性，有濒死感，休息与口含硝酸甘油均不能缓解，伴大汗、恶心，呕吐过2次，为胃内容物，二便正常。既往无高血压和心绞痛病史。吸烟20余年，每天1包。

患者准备急诊行介入治疗，此时患者突然气急加重，端坐呼吸，咳粉红色泡沫样痰，BP95／65mmHg。此时你应做何紧急抢救处理？（）

A.给予呋塞米20mg静脉推注

B.静脉泵注硝酸甘油

C.静脉推注毛花苷丙（西地兰）

D.伴严重低氧血症者可行机械通气治疗

E.暂缓介入治疗，待病情平稳后再进行

F.静脉应用小剂量多巴酚丁胺

药品零售药店对处方药和非处方药应采用（）

A.分柜摆放销售方式

B.有奖销售方式

C.开架自选销售方式

D.凭执业医师处方销售方式

现行规范汉字的依据有哪些？

请结合你对中国水利建设现状的思考，参考给定资料，自拟题目，写一篇文章。
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