试题与答案

关于脑毛细血管扩张的MRI表现,下列哪种说法是正确的()A.病理上由扩张的毛细血管组

题型:单项选择题

题目:

关于脑毛细血管扩张的MRI表现,下列哪种说法是正确的()

A.病理上由扩张的毛细血管组成,管壁含有平滑肌和弹力纤维 

B.幕上最多见,其次为小脑、脑干和脊髓 

C.梯度回波T2WI呈明显低信号,与脱氧血红蛋白引起局部磁场不均匀有关 

D.多数表现为T1WI和T2WI均为高信号 

E.常规SE序列T1WI和T2WI可无异常发现,GD-DTPA增强后多数表现为脑回状强化 

答案:

参考答案:C

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题型:单项选择题

If you often feel tired and the doctor can’t find anything wrong with you, you may be in a state of Subhealth (亚健康). Subhealth is a state between health and illness. Most of the subhealthy people are middle-aged ones who are usually stressed out because of work and family. And some of them are students who are having exams.
If you are subheahlty, it is not difficult for you to become well soon. You should have good living habits. For example, you should get up early and go to bed early. And you should exercise regularly. Exercising can keep you healthy. As for meals, it is better to eat less salt and sugar. Vegetables, fruit and fish are important to your body. You should eat more of them. It is not good to eat too much at one meal, because it may cause unhealthy changes in the digestive tract(消化道). And at last, a balanced diet is very helpful in staying away from subhealth.

According to the passage, who will probably be subhealthy

A.Teachers and students.

B.Parents and children.

C.Middle-aged people and students.

D.The young and the ol

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