题目

— Terry, may I use your eraser? Mine has been  __________ for a couple of days.          — Sure, here you are.        A. lonely                B. separate             C. sleepy        D. missing 答案：D用0～3V量程的电压表来测量串联干电池组的电压，串联的干电池的节数最多是 [     ]A．2节 B．3节 C．4节 D．5节