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【单选题】
关于蛛网膜囊肿说法错误的是A.
原发性蛛网膜囊肿为先天发育异常所致，小儿多见
B.
少数脑肿瘤也可合并蛛网膜囊肿
C.
脑脊液在脑内异常局限性集聚
D.
继发性蛛网膜囊肿多由外伤、感染、手术等原因所致
E.
可发生于任何年龄，中青年多见
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【单选题】What does the author say about the cause（s） of cheating? 查看材料
A.
Family， culture and society play an active part.
B.
Bad school environment is the leading cause of student cheating.
C.
Parents are always to blame for their children's cheating behaviour.
D.
Cheating exists primarily because students learn bad things from TV.
【单选题】What's the major cause in the decline of Asian elephants?
A.
Their taming for circuses and zoos.
B.
The destruction of their natural homes.
C.
Man's lack of knowledge about their behavior.
D.
The greater vulnerability to extinction than other species.
【单选题】What is a cause for the change of Stefania’s body clock?
A.
Eating fewer hours of sleep.
B.
Having more hours of sleep
C.
Lacking physical exercise.
D.
Getting no natural light.
【单选题】What was the cause of the patient's disease?
A.
Headaches.
B.
Stomach trouble.
C.
Disturbance of conscience.
D.
Some unknown physical weakness.
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