诊断慢性胆囊炎最确切的依据是()A．有Charcot三联征 B．有胆绞

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问题单项选择题

诊断慢性胆囊炎最确切的依据是()

A．有Charcot三联征

B．有胆绞痛病史

C．长期慢性消化不良症状

D．超声检查胆囊排空障碍

E．胆囊造影屡不显影

答案

参考答案：E

选择题

She tried _______, but failed; now she could do nothing but wait till her husband came.

A．to search the pockets her key

B．searching her keys for her pockets

C．searching the pockets for her keys

D．to search her keys for the pockets

判断题

共聚单体／乙烯比越大，聚乙烯树脂的密度越小，熔融指数也越小。