【单选题】等物质的量的KClO 3 ,分别发生下述反应: ①有MnO 2 催化剂存在时,受热分解得到氧气; ②若不使用催化剂,加热到470℃左右,得到KClO 4 (高氯酸钾)和KCl; 下列关于反应①和②的说法正确的是( )
【单选题】Whatever she does, it _______ no difference.
【单选题】等质量的KClO 3 分别发生下述反应: ①有MnO 2 催化剂存在时,受热分解得到氧气; ②若不使用催化剂,加热至470℃左右,得到KClO 4 (高氯酸钾)和KCl。 下列关于①和②的说法不正确的是 [ ]
【单选题】在R、L、C串联电路中,若总电压U、电感电压U以及R、C两端的电压U RC 均为400V,且R=50Ω,则电流I应为______A。
【单选题】Why does the interviewee think that teaching institutions should be community-based?
A.
Because it costs less.
B.
Because teachers will learn quickly.
C.
Because it is required by experts.
D.
Because the cultural patterns are diverse.
【单选题】He always gives ( ) to his wife’s demands and does whatever she tells him to.
【单选题】在R、L、C串联电路中,若总电压U、电感电压U L 及RC两端的电压U RC 均为400V,且R=50Ω,则电流I为______。
【单选题】Whatever she does, it no different.