如图所示的四个电路中,电源电压U相同,,电路的总电阻由小到大的顺序是
B.丁丙乙甲
C.丁甲乙丙
D.丙乙甲丁
答案:C
This is an illness that can total blindness if it is left untreated.
A.result from
B.lead in
C.result in
D.leave behind
过量产生胆碱能危象
A.毛果芸香碱B.阿托品C.新斯的明D.碘解磷定E.有机磷酸酯类