既病防变主要包括（）A.早期诊断 B.控制病传 C.早期治疗 D.加强锻炼 E.调养

下列旅游资源不属于北京的是[ ]

A．颐和园、天坛

B．圆明园

C．长城、故宫

D．秦陵兵马俑

某设备厂筹资新建一生产流水线，该工程设计已完成，施工图纸齐备，施工现场已完成“三通一平”工作，已具备开工条件。 通过资格预审并参加投标的共有A、B、C、D、E五家施工单位。开标会议由招标代理机构主持，开标结果表明这五家投标单位的报价均高出标底价近300万元，这一异常引起了招标人的注意。为了避免招标失败，业主提出由招标代理机构重新复核和制定新的标底。招标代理机构复核标底后，确认是由于工作失误，漏算了部分工程项目，使标底价偏低。在修正错误后，招标代理机构重新确定了新的标底。A、B、C三家投标单位认为新的标底不合理，向招标人提出要求撤回投标文件。 由于上述问题纠纷导致定标工作在原定的投标有效期内一直没有完成。为早日开工，该业主更改了原定工期和工程结算方式等条件，指定了其中一家施工单位中标。 [问题]1．根据该工程的具体条件，工程师应向业主推荐采用何种合同(按付款方式划分)为什么 2．上述招标工作存在哪些问题 3．A、B、C三家投标单位要求撤回投标文件的做法是否正确为什么 4．如果招标失败，招标人可否另行招标投标单位的损失是否应由招标人赔偿为什么

社会主义民族关系的本质特征是什么？

阅读理解

     If you see someone drowning, speed is very important. Once you get him out of the water, if he isn't

breathing, you have four minutes before his brain is completely destroyed.  Support his neck, tilt(使翘

起) his head back and press his chin (下巴) upwards.This stops the tongue blocking the airway in the

throat and is sometimes enough to get him breathing again. If that doesn't work, start mouth-to-mouth

breathing. Prees his nostrils (鼻孔) together with your fingers. Open your mouth and take a deep breath.  Blow into his lungs until his chest rises, then remove your mouth and watch his chest fall. Repeat

twelve times a minute. Keep doing until help arrives.

    To bring a child back to life, keep your lips around his mouth and nose and gently blow into his

mouth. Give the first four breaths as quickly as possible to fill the blood with oxygen. If, in spite of your

efforts, he starts tuming a blue-grey colour, and you can feel no pulse (脉搏) , then pressing is the last

chance of saving his life.

    With arms straight, rock forwards, pressing down on the lower half of the breastbone. Don't be too

hard or you may break a rib(肋骨). Check how effective you are seeing if his colour improves or his

pulse becomes independent to your chest pressing. If this happens, stopthe pressing. Otherwise continue

until rescue amves.

1. This passage is mainly about          .

A. how to save people out of the water

B. how to give first aid to people who are drowning

C. how to do mouth-to-mouth breathing

D. how to save a child from a nver

2. Once you get a drowning man out of the water, if he isn't breathing, you must first       .

A. get him breathing again

B. take him to the nearest hospital as soon as possible

C. find someone to help you

D. call the First Aid Centre

3. In the last paragraph, the underlined word "rescue" means       .

A. breath                    

B. help

C. doctor                    

D. pulse

4. If the drowning boy has no pulse,        .

A. pressing his chin upwards is enough to get him breathing

B. blowing air into his mouth is sure to save his life

C. pressing his nostrils together with your fingers can work

D. pressing is the last chance of saving his life

妊娠合并再障对胎儿的影响哪项应除外（）

A.当孕妇重度贫血时可出现胎儿发育迟缓

B.当血红蛋白≤60g／L时可以导致流产

C.当孕妇重度贫血时可发生早产

D.当孕妇重度贫血时可发生死胎、死产

E.当孕妇重度贫血时可发生胎儿畸形