电击伤是指（） A.电弧对人体烧伤 B.电火花对人体烧伤 C.电点燃衣物对人体烧伤

计算机系统安全保护模型主要包括()等方面。

A.通过凭证审核保护

B.通过法律与制度保护

C.通过技术措施保护

D.通过审计与监控保护

病历摘要：女，17岁。昨晚与家人吵架后，今晨起床四肢无力，行走不能，抬手困难，送院急诊。无头痛、头晕，无呼吸困难。既往甲亢病史3年，已治愈停药1年；2周前腹泻多次，外院门诊治疗好转。查体：T36.7℃，神清，对答切题，语利，颅神经（-），四肢肌张力低，肌力近端Ⅱ级，远端Ⅲ级，腱反射迟钝，病理征（-），四肢感觉麻木。

目前考虑何种疾病可能性最大，应予何种治疗？（）提示：入院后病情进一步加重，呼吸困难，二便正常。查体：T36.5℃，R28次/分，口唇发绀．神清，对答切题，语利，呼吸无力，咽反射消失，四肢肌张力低，肌力Ⅰ级，腱反射迟钝，病理征（-），四肢手套袜子形感觉减退。

A.多发性肌炎激素治疗

B.周期性瘫痪补钾治疗

C.Landry上升性麻痹呼吸机辅助呼吸血浆交换

D.甲亢性周期性瘫痪丙基硫氧嘧啶

E.急性上升性脊髓炎呼吸机辅助呼吸激素治疗

F.癔病性瘫痪心理治疗

G.急性甲亢性肌病丙基硫氧嘧啶

认真观察分析下图所示装置，并填空．

（1）甲装置可用来验证______是光合作用的原料．若此装置需要一个对照实验，对照实验装置的烧杯内应装有等量的______．

（2）乙装置可用来验证______．

（3）丙装置是验证______的实验．

（4）丁装置若用来验证蒸腾作用，此装置有无不妥之处？若有，应怎样改进？若用来验证植物的呼吸作用，此装置应放在______的地方．

阅读理解。

                                                       Rocky Mountain Ventures

     About

     Shoe the Boat! Guided snowshoe tours through Steamboat's backcountry. All equipment and transportation

provided. We provide: snowshoes, poles, water bottles, and day pack. Lunch is included on all day trips.

Guides carry first aid kit, extra hat, gloves, cell phone, maps, compass, sunscreen and more. You should bring

hiking boots, a hat, sunglasses, and a camera.

     It is best to dress in layers. Depending on the temperature you will generally have one or two additional

clothing layers made of thin to medium thickness "breathable" material. Always bring a good quality water proof

in case of unexpected showers.

     Location

     Guides will pick you up at their location within the town and the mountain area. Call when you arrive to

make sure of reservation (预订)and pick-up time. Transportation is provided from town or the mountain area.

Your guide for the day will pick you up and drop you off at your lodging for half day tours.

     Hours

     Half day tours are available at 9:00am or 1:00pm. Full day tours start at 9:00am and return at 4:00 p.m. Full

moon tours area available at 6:00pm and return around 9:00pm. Wildlife tours are available at 9:00am or 1:00pm. All half day tours are nearly 3-3.5 hours long, (actual snowshoeing is about 2-2.5 hours). 

     Rates 

     These are the 2006/2007 rates. For all tours it is half price for kids 12 or under when accompanied by an

adult.

1. Before your snowshoe tours, you'll have to prepare yourself ______.

A. food for lunch

B. snowshoes

C. clothing layers

D. a cell phone

2. You must call your guide when you arrive because ______.

A. he will give you advice for your snowshoe tour

B. he carries a lot of things and needs your help

C. he has to know when and where to pick you up

D. he lives within the town and the mountain area

3. The Smith family would like to go for a half day snowshoe tour. He'd better meet his guide ______.

A. at 9:00 a.m

B. at 4:00 p.m.

C. at 6:00 p.m.

D. at 9:00 p.m.

4. Mr Smith went for a half day tour together with his wife and two sons, one aged 13 and the other

    aged 11. He had to pay__________dollars.

A. 600

B. 315

C. 360

D. 280

合理地计算提取折旧有何意义？