题型:问答题 简答题 近年来,酒驾几乎成为一种“社会公害”。交警用来检测酒驾的酒精测试仪的工作原理如图所示,其中P是半导体型酒精气体传感器,该传感器的电阻r'的倒数与酒精气体的浓度C成正比,R0为定值电阻。以下关于电流表的示数I与酒精气体浓度C之间关系的图象,正确的是[ ]A.B.C.D. 查看答案
题型:问答题 简答题 —It’s said that Wang Meng spent almost 10 hours training every day.—That’s true. She is really hard-working. ________, she won 3 golden medals in the 21st Winter Olympics.A.By the wayB.First of allC.As a resultD.In order to 查看答案