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问题 单项选择题 A1/A2型题

膝关节骨性关节炎X线表现（）。

A.早期多为阴性

B.髌骨后上角或后下角骨质增生

C.关节间隙变窄

D.关节面下方囊肿形成

E.以上都是

答案

参考答案：E

解析：本病主要病理变化是关节软骨受损、破坏和继发性骨质增生。X线表现为：早期多阴性；.髌骨后上角或后下角骨质增生；关节间隙变窄；关节面下方囊肿形成。

单项选择题

During our two months on the road, Bennett and I had a really (1) experience with a good, honest (2) and some helpful mechanics.

We were driving east on Highway 10 when our "chick engine" light came on. We limped of a(n) (3) into Las Cruces. We had a real car (4) Bennett nursed the ear into a local garage. By this time the car was missing so (5) it was shaking all over. This was the (6) time to arrive at a garage—late Friday afternoon. Service adviser Scott was busy (7) paper work and customers as we (8) our problems. (9) he was already "ten cars behind", he told us to pull the car into the garage.

Lincoln, who we later (10) was one of the two motor technicians, took (11) of our car repairing. He and Scott and some other mechanics stayed several hours after closing, (12) the car.

Early the next morning (the shop was officially closed on Saturdays), Lincoln finally located the (13) and fixed it easily within only (14)

Later Scott (15) out to us that it was our attitude that helped. "You didn’t come into the place demanding this or that. You showed an (16) of our problems on a busy Friday afternoon. Customer’s attitude means a lot. " He was right in some way, customers should show (17) and understanding to people who (18) them. (19) people were extremely busy, they found way to at least try and help when they are met with politeness.

The pleasant experience I had shows that (20) for other people can always help.

4().

A.difficulty 

B.examination 

C.trouble 

D.disaster
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选择题

某工厂共有50名员工，他们的月工资的标准差为S，现厂长决定给每个员工增加工资100元，则他们的新工资的标准差为（    ）

A．S＋100

B．S

C．S变大了

D．S变小了
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