问题 单项选择题

下列CT检查结果中,哪一项对于星形细胞瘤与脑梗死的鉴别诊断最有价值( )。

A.不强化
B.低密度
C.单叶分布
D.多叶分布
E.不按血管分布区出现

答案

参考答案:E

解析: 星形细胞瘤CT检查可见病变多位于蛋白质,不按血管分布区出现。Ⅰ级肿瘤通常呈低密度灶,分界清楚,占位效应轻,无或轻度强化(除毛细胞和室管膜下巨细胞型外)。Ⅱ~Ⅳ级肿瘤多呈高、低或混杂密度的肿块,可有斑点状钙化和瘤内出血,肿块形态不规则,边界不清,占位效应和瘤周水肿明显,可呈不规则环形伴壁结节强化,有的则呈不均匀性强化。

阅读理解

Ticket Types
Regulations
Notes
Single Day
Admission
*For all visitors
*On any standard Day other than Peak Day
*One ticket per person, valid(有效的)for one entry on the day of admission
Standard Day tickets refer to the tickets for all visiting days(167 days in total)
except for Peak Days during the Expo.
Special Admission
*For the disabled
* For people born in or before 1950
*For students with valid IDs
*For children above 1.2m
*For Chinese military personnel on active duty
*Valid IDs are required upon ticket purchase and entry
*On any Standard Day other than Peak Day
*One ticket per person, valid for one entry on the day of admission
3 Day
Admission
*For all visitors
*Valid for any three days except Peak Days
*One ticket per person, valid for one entry per day
 
The tickets are designed to meet the multi-entry demand of visitors.
7 Day
Admission
* For all visitors
*Valid for any seven days except Peak Days
*One ticket per person, valid for one entry per day
 
小题1: _______ can get a Special Admission ticket for himself/ herself.
A.A 56-year-old bus driverB.A school girl with her valid student card
C.A policeman in his fortiesD.A U.S. army officer on active duty
小题2:If you want to enter the Expo Park once every week in one month and don’t want to bother to buy the ticket each time, you can buy a ______ ticket.
A.Single Day AdmissionB.Special Admission
C.3 Day AdmissionD.7 Day Admission
小题3:The function of the table is to ______ .
A.remind the public of the difficulty buying the Expo tickets
B.show which groups of people can get admission into the Expo Park
C.provide information about the Expo tickets and regulations
D.introduce all the visiting regulations in the Expo Park
单项选择题