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【单选题】
以下不是细菌对抗菌药物产生的耐药机制是:A.
产生水解酶
B.
改变代谢途径
C.
原始靶位结构改变
D.
增加胞浆膜通透性
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皮皮学刷刷变学霸
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【判断题】数字电路的两个基本工作信号用0和1表示，对应的电路有两种不同的工作状态，即低电平和高电平(或低电位和高电位)，也叫逻辑。逻辑分为正逻辑和负逻辑，0表示正逻辑，1表示负逻辑。
A.
正确
B.
错误
【简答题】A sandstorm, also known as a dust storm, is exactly what it sounds like. A very strong windstorm especially in the desert carries clouds of sand or dust that greatly reduces visibility. This wind is u...
【单选题】By what method is heat transferred from the hotplate to the water?
A.
Radiation.
B.
Conduction.
C.
Thermal.
D.
Convection.
【简答题】A sandstorm, also known as a dust storm, is exactly what it sounds like. A very strong windstorm especially in the desert carries clouds of sand or dust that greatly reduces visibility. This wind is u...
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