贵族政治

A公司用一台已使用2年的甲设备从B公司换入一台乙设备，支付置换相关税费10000元，并支付补价款30000元。甲设备的账面原价为500000元，预计使用年限为5年，预计净残值率为5%，并采用双倍余额递减法计提折旧，未计提减值准备；乙设备的账面原价为300000元，已提折旧30000元。置换时，甲、乙设备的公允价值分别为250000元和280000元。A公司换入的乙设备的入账价值为( )元。

A．220000

B．236000

C．290000

D．320000

阅读理解。

      London has become a cycle friendly zone after the launch of a new bike hire scheme. It has been

designed to encourage more people to cycle in and around central London.

     So how does it work?First you have to sign up to the scheme to be sent a key. The key will unlock

one of the bikes,which are kept at docking stations in and around central London. You have to pay an

access fee for the key and then you pay as you go, for the length of time you use the bike.

     Transport for London,which runs the scheme,are hoping to have 6,000 bikes and 400 docking

stations in place by the end of the year. The new hire system is hoping to ease congestion(拥挤)in

London and is expected to create up to 40,000 extra cycle trips a day into the city centre. London

Mayor Boris Johnston launched the scheme and said London had been "filled with thousands of

gleaming machines that will transform the look and feel of our streets and become as commonplace

on our roads as black cabs and red buses"．

     However,there have been a few problems since the scheme was launched last Friday. On the first

day some people found they couldn't dock their bikes properly and their usage of the bikes had not

registered. Transport for London did admit they had been expecting a few "teething problems" and

have said they wouldn't charge for the first day as a "gesture of goodwill". Some other people have

criticized the lack of docking stations and locks for the bikes as well as the price it costs to hire the

bicycles.

      Despite the comments,the greenthinking London Mayor still seems very positive about things,

saying,"My campaign for the capital to become the greatest big cycling city in the world has taken

a big pedalpowered push forwards."

1．London Mayor Boris Johnston launched the new bike scheme in order to ________.

A．reduce the air pollution of the city

B．encourage the citizens to take exercise

C．deal with the city's traffic problems

D．increase employment opportunities

2．If you want to hire a bike, in which order will you do?

a. pay for the bike according to the time you use it

b. pay for the key to a bike

c. cycle in and around central London

d. sign up as a member to get a key

A．bdca  

B．bcad

C．dcba  

D．dbca

3．All the following are the problems of the scheme EXCEPT________.

A．the high cost to hire a bike

B．not registering their usage of the bikes

C．not charging for the first day of the scheme

D．docking the bikes properly

4．From the passage we can infer that ________.

A．London Mayor is confident of the scheme

B．the scheme will be cancelled because of the problems

C．all the citizens in London support the scheme

D．the cycling revolution is not successful

原发性骨髓纤维化症伴有的髓外造血主要发生在（）

A.心脏

B.淋巴结

C.骨髓

D.脾脏

E.肝脏

实验室的生物安全防护水平分为四级，其中（）防护水平最低。

A.一级

B.二级

C.三级

D.四级