30CrMnSi和3CrW8V
举一反三
- 某债券面值1000元，票面利率为8%，期限10年，每半年付息一次，要对这种债券进行投资，当前的市场利率为6%，计算债券内在价值。 A: V=30（P/A,4%,20）+1000(P/F,4%,20) B: V=30（P/A,4%,20）+500(P/F,4%,20) C: V=40（P/A,3%,20）+1000(P/F,3%,20) D: V=40（P/A,3%,20）+500(P/F,3%,20)
- When will the bank open on Sundays A: From 8:30 a.m. to 8:30 p.m. B: From 9:30 a.m. to 6:30 p.m. C: From 8:30 a.m. to 6:30 p.m. D: From 9:30 a.m. to 3:30 p.m.
- M: When will the bank openW: It opens from 8:30 a.m. to 6:30 p.m. from Monday .to Friday, and it opens from 9:30 a.m. to 3:30 p.m. on Saturday and Sunday. When will the bank open on Sundays（） A: From 8:30 a.m. to 8:30 p.m. B: From 9:30 a.m. to 6:30 p.m. C: From 8:30 a.m. to 6:30 p.m. D: From 9:30 a.m. to 3:30 p.m.
- 12Ω和8Ω的电阻串联，电路的总电压是20V，这两电阻的电压分别是（） A: 16 V、4 V B: 8 V、6 V C: 12 V、8 V D: 8 V、12 V
- 人体的最小电阻和工频交流电的致命电流通常是()。 A: 800~1000Ω,30~50mA; B: 800~1000Ω,3~5mA; C: 8~10kΩ,30~50mA; D: 8~10kΩ,3~5mA。