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问题 多项选择题

老年人血管系统的变化有（）。

A.动脉壁硬化

B.血浆中去甲肾上腺素水平随年龄的增长而降低

C.主动脉球部钙化

D.舒张压下降

E.收缩压升高

答案

参考答案：A, C, E

单项选择题 B1型题

内有虫积，呕吐物特征为（）。

A.呕吐黄水味苦

B.呕吐酸水绿水

C.泛吐清水

D.呕吐酸腐难闻

E.呕吐涎沫
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单项选择题

Which one of the following statements about epithelia is FALSE

A．They are polarized

B．They are vascular

C．They are separated from underlying connective tissue by a basal lamina

D．They contain only a small amount of intercellular substance

E．They line the lumen of blood vessels
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