用CT来诊断缩窄性心包炎，错误的是（）。 A.平扫显示心包异常不_爱下问搜题

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问题单项选择题

用CT来诊断缩窄性心包炎，错误的是（）。

A.平扫显示心包异常不规则增厚

B.不能发现X线平片未能显示的钙化灶

C.EBCT增强扫描能观察到左、右心室内径缩小

D.可显示腔静脉扩张，左、右心房扩大

E.可显示腹水及胸腔积液

答案

参考答案：B

阅读理解

Top help you decide what might make a good pet ,we’ve put together a pet checklist .We’ve named some of the animals that are often kept as pets .We’ve shown some good points and bad points about each .And we hope it may help you make the best choice（选择）

Pick-a-Pet Checklist（清单）
Pets	Good Points	Bad points
Rabbit	Easy to keep Enjoy being petted Good to hold	Hard to house train Drop lots of hair Easily upset by high temperature
Raccoon	Can be very interesting Can be friendly when young	Against the law to keep in many states in the U.S. Can get unkind when older
Cat	Easy to feed & care for Can live indoors or out Fun to hold Very friendly	May scratch furniture Little pans can be messy May kill birds May make you sneeze
Dog	Come in many sizes Can live indoors or out Fun to love & play with Very friendly Can give safety	Can be smelly ,messy ,noisy Need to be licensed& trained May make you sneeze May bite(咬)if angry Need lots of attention

小题1:You are ______ to keep a raccoon as a pet in many places of America.
A. suggested B. encouraged C. not allowed
小题2:It would be easier for you to keep a ______ as a pet if you’re often too busy to take care of it .
A. rabbit or raccoon B. rabbit or cat C. raccoon or dog
小题3:If you feed birds at home , you should be very careful to choose a ______ as your another pet.
A .rabbit B. raccoon C. cat
小题4:The dog may ______ you if you make it angry .
A. hurt B. fix C. train
小题5:The writer tries to help us______ with the checklist .
A. learn how to look after our pets
B. find which animal is our best choice as a pet
C. Know what kind of animals can be kept as a pet

填空题

若|a|=3，|b|=5，且a＜b，则a+b=（）。