Which of the following statements is true: ( )
A: RO• is not a very reactive species
B: RO• is not thought to be an intermediate in the smog-forming process.
C: RO• is a free radical
D: RO• is readily formed by the action of stable hydrocarbons and ground state NO2
A: RO• is not a very reactive species
B: RO• is not thought to be an intermediate in the smog-forming process.
C: RO• is a free radical
D: RO• is readily formed by the action of stable hydrocarbons and ground state NO2
举一反三
- 电压串联负反馈可以（ ）。 A: 提高ri和 ro B: 提高ri降低ro C: 降低ri提高了ro D: 降低ri和ro
- ①H ；②RCH2 ；③H2O； ④RO—；⑤NO2 ； ⑥CN—；⑦NH3；
- 理想运算放大器的主要特征为______。 A: Avo→∞，Ri→0， Ro→∞ B: Avo→∞，Ri→∞，Ro→0 C: Avo→∞，Ri→∞，Ro→∞ D: Avo→∞，Ri→0， Ro→0
- 对于一个理想的直流稳压电源，正确的是： A: S＝0，RO＝0 B: S＝0，RO＝∞ C: S＝∞，RO＝0 D: S＝∞，RO＝∞
- 图a电路按戴维南定理等效成图b所示电压源时，计算Ro的正确算式是（） A: Ro=R1//R2 B: Ro=R1+R2 C: Ro=R1 D: Ro=R2