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问题 填空题
已知在直角梯形ABCD中，上底CD=4，下底AB=10，非直角腰BC=4
3
，则底角∠B=______．
答案

如图，过C作CE⊥AB于E，则四边形AECD是矩形

，

∴AE=CD=4，

在Rt△BEC中，BE=6，BC=4

3
，

∴cos∠B=

BE
BC
=
6
4
3
=
3
2
，

∴∠B=30°．

故答案为30°．

多项选择题

世界银行贷款的特点主要是（ ）

A．申请贷款很容易

B．贷款期限较长

C．贷款实行浮动利率

D．还本付息实行货币总库制

E．申请贷款需用时间较长
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阅读理解
阅读理解。
     Su Hua is studying at Cambridge, UK. She has bought a bicycle and is worried about security (安全).
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 out-of-the-way 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 as 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 companies who will security 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. 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  
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