2022第四章药理学题库抗微生物药题库每日一练精选(12月03日)

1. [单选题]Clearance volume scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished （）.

A. during the valve overlap period
B. with only the exhaust valve open
C. at a pressure below atmospheric
D. without cooling the cylinders or pisto

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