某银行的欧元对人民币的即期汇率报价为EuBl=CNY9.6363。客户按该汇率从该银

实验室配制溶液时，有以下操作：

①溶解  ②称量  ③计算  ④装瓶存放，贴上标签．

回答下列问题：

（1）现欲配制50g 5%氯化钠溶液，操作步骤为______（填序号）．

（2）溶解操作中需要的仪器有______、______．

（3）量取蒸馏水时，若仰视读数，则会导致氯化钠溶液的溶质质量分数______（填“＜”或“＞”）5%．

阅读理解

     Su Hua is studying at Cambridge, UK.She has bought a bicycle and is worried about security.Her

friend, Kate, found this article and sent it to her.

     Introduction

     A lot of crime is against bicycles.About 150,000 bicycles are stolen every year and most are never

found.You can prevent this happening by following a few careful steps.

     Basic Security

     Do not leave your bicycle in outoftheway places.Always lock your bicycle when you leave.Secure it to

lampposts or trees.Take off smaller parts and take them with you, for example lights and saddles (车座).

     Locks

     Get a good lock.There are many different types in the shops.Buy one that has been tested against

attack.Ask for a recommendation from a bike shop.

     Marking

     Security marking your bike can act_a_deterrent_to_a_thief.It can also help the police find your bicycle.It should be clearly written and include your postcode and your house or flat number.This will provide a

simple way to identify your bicycle.

     Registration

     There are a number of security companies who will help mark your bicycle for you.They will then put

your registration number and personal details on their computer database.Then if your bicycle is found it

will be easy to contact you.

     Finally

     Keep a record of the bicycle yourself: its make, model and registration number.You can even take a

photograph of it.This will prove the bicycle belongs to you.

1. Which part of the text gives you information on how to lock up your bicycle when you leave it?

A. Locks.  

B. Marking.

C. Registration.  

D. Basic Security.

2. The underlined phrase "act as a deterrent to a thief" means ________.

A. help you recognize your bike

B. help the police find your bicycle

C. stop someone stealing your bicycle

D. stop you worrying about your bike

3. The article advises you to keep a record of your bicycle ________.

A. in the bike shop and your computer

B. in the police station and a security company

C. in a security company and your university

D. by yourself and in a security company

4. What can we know from this article?

A. Lots of bicycles are stolen every year and few of them are found.

B. If you take off smaller parts of your bike, they will be stolen easily.

C. Most locks in the shops have been tested against attack.

D. Security marking your bike makes it easy to contact you for the finders.

5. The main purpose of this article is ________.

A. to tell you what to do if your bicycle is stolen

B. to suggest ways of keeping your bicycle safe

C. to give you advice on where to buy a good lock

D. to say why you shouldn't keep your bicycle in a quiet place

公安机关人民警察内务建设的原则是( )、加强监督、着眼基层。

A．高效务实

B．实事求是

C．与时俱进

D．严格要求

编制施工项目成本计划，关键是确定项目的（）

A．概算成本

B．成本构成

C．目标成本

D．实际成本

凡在1年内接到警告通知书两次以上或通报批评三次以上的饭店，旅游饭店星级评定机构应降低或取消其星级。