商店里的电子秤是利用了下列哪种电阻制成[ ]
A.光敏电阻
B.热敏电阻
C.滑动变阻器
D.压敏电阻
答案:D
—Has he changed his mind?
—Yes. After some hours of discussion, I ____ to talk him into accepting the new plan.
A.had managed
B.would managed
C.have managed
D.managed
咳嗽,咳铁锈色痰常见于
A.肺结核
B.支气管扩张
C.大叶性肺炎
D.肺癌
E.急性肺水肿