【单选题】听力原文:M: If you happen to see the thief who stole my money, please call the police station. W: What does the thief look like? M: He is a middle-aged man, with long black hair and wearing a T-shirt. Whi...
【判断题】The resting membrane potential of a typical animal cell arises predominantly through the action of the Na-K pump, which in each cycle transfers 3 Na ions out of the cell and 2 K into the cell, leaving...