下列各项组合中，能准确判断酸中毒性质严重程度和代偿情况的是（） A.动脉血和尿的pH

5月12日我国四川汶川县发生里氏8.0级大地震,地震给四川,甘肃,陕西等地造成巨大人员伤亡和财产损失.灾难发生后,我校师生和全国人民一道,迅速伸出支援的双手,为灾区人民捐款捐物.为了支援灾区学校灾后重建,我校决定象灾区捐助床架60个,课桌凳100套.现计划租甲、乙两种货车共8辆将这些物质运往灾区,已知一辆甲货车可装床架5个和课桌凳20套, 一辆乙货车可装床架10个和课桌凳10套.

(1)学校如何安排甲、乙两种货车可一次性把这些物资运到灾区?有几种方案?

(2)若两种货车每辆要的运输费相差200元,则学校应选择哪种方案,使运输费最少?

语法填空。

     Melissa Poe was 9 years old __1__she began a campaign for a cleaner environment by writing a letter

to __2__ President Bush. Through her own efforts, her letter was reproduced on over 250 __3__(donate) billboards(广告牌) across the country.

     The response __4__ her request for help was so huge that Poe established Kids For A Cleaner

Environment (Kids F. A.C.E) in 1989.There are now 300,000 members of Kids F. A.C.E worldwide

and it is the __5__(world) largest youth environmental organization.

     Poe has also asked the National Park Service to carry __6__ a "Children Forest" project in every

national park. In 1992, she was invited __7__ one of six children in the world to speak at the Earth

Summit in Brazil. In 1993, she __8__ (give) a Caring Award for her efforts by the Caring Institute.

__9__ the organization started, Kids F. A.C.E members have distributed and planted over 1 million

trees! "You need to start being a responsible, __10 _(environment) friendly person now, right away,

before you become a resourcesucking adult, " she explains.

公务秘书与非公务秘书的区别主要有哪些

“自1898年7月24日中国第一份妇女报刊——《女学报》问世，晚清的女性解放即与艰难奋争的女报结伴而行。在目前已知的近二十种清末女报中，除去校刊……内容最丰富者，当属《女子世界》。”对上述材料的解读，正确的是

①晚清开始创办、发行专门的妇女报刊   ②《女学报》在一定程度上引领了女性解放潮流   ③女报客观上起到传播西方近代文明的积极作用   ④《女子世界》是晚清最具影响力的妇女报刊             

A．①③④

B．①②③

C．①②④

D．②③④

汽轮机停机后，盘车未能及时投入，或盘车连续运行中途停止时，应查明原因，修复后先盘（）直轴后，再投入（）。