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问题 单项选择题

男，40岁，头痛，CT示斜坡破坏，有一3cm×4cm混杂密度影伴斑点状钙化，脑干后移，最可能的诊断是()

A．脊索瘤

B．脑膜瘤

C．垂体瘤

D．颅咽管瘤

E．基底动脉

答案

参考答案：A

单项选择题 A型题

引起臭米面食物中毒的致病菌是（）

A.黄曲霉菌

B.致病性大肠杆菌

C.镰刀菌

D.椰毒假单胞菌

E.肉毒梭菌
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单项选择题

Which of the following statements about asset backed securities (ABSs) is most accurate（）

A. The credit rating of an ABS must be the same as that of the issuer.

B. Residential mortgages represent the largest type of asset that has been securitized.

C. There is an inverse relationship between credit enhancements and ratings.
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