[国开形考作业] 阳极是晶闸管主电路与控制电路的公共端。 日期：2021-05-28 10:33:24 点击：103 好评：0
(判断题)20: 阳极是晶闸管主电路与控制电路的公共端。 A: 错误 B: 正确 ...
[国开形考作业] 整流电路按变压器二次侧电流的方向分为： 日期：2021-05-28 10:32:59 点击：104 好评：0
(多选题)14: 整流电路按变压器二次侧电流的方向分为： A: 单拍电路 B: 双拍电路 C: 桥式电路 D: 零式电路 ...
[国开形考作业] 单相电流型逆变电路一周期工作波形中有（）个稳定导通阶段和（） 日期：2021-05-28 10:32:32 点击：197 好评：0
(单选题)8: 单相电流型逆变电路一周期工作波形中有（）个稳定导通阶段和（）个换流阶段。 A: 1，1 B: 2，2 C: 1，2 D: 2，1 ...
[国开形考作业] 冲量指窄脉冲的（）。 日期：2021-05-28 10:32:05 点击：192 好评：0
(单选题)2: 冲量指窄脉冲的（）。 A: 高度 B: 频率 C: 面积 D: 能量 ...
[国开形考作业] I forgot to ring up Mr. Wang yesterday, so I _______ today. 日期：2021-05-28 10:30:26 点击：56 好评：0
(单选题)22: I forgot to ring up Mr. Wang yesterday, so I _______ today. A: can do it B: must do it C: had to do it D: must have to do it ...
[国开形考作业] "I must be going now.""Oh, it's s 日期：2021-05-28 10:30:03 点击：57 好评：0
(单选题)16: "I must be going now.""Oh, it's still early, _____ you stay a bit longer?" A: will B: wouldn't C: won't D: can ...
[国开形考作业] — Congratulations! You won the first prize in today’s spee 日期：2021-05-28 10:29:19 点击：152 好评：0
(单选题)4: — Congratulations! You won the first prize in today’s speech contest. — ____________________ A: Yes, I beat the others B: No, no, I didn’t do it well. C: Thank you D: It’s a pleasure. ...
[国开形考作业] I needn't have taken a taxi. I______, it was only a hundred 日期：2021-05-28 10:28:39 点击：60 好评：0
(单选题)17: I needn't have taken a taxi. I______, it was only a hundred meters. A: could walk B: should walk C: could have walked D: ought to walk ...
[国开形考作业] I don’t know why she avoids _______ her opinion on the subj 日期：2021-05-28 10:27:44 点击：51 好评：0
(单选题)24: I don’t know why she avoids _______ her opinion on the subject. A: to give B: to be given C: giving D: being given ...
[国开形考作业] I can’t find the key _____the door. Maybe I lost it. 日期：2021-05-28 10:26:53 点击：124 好评：0
(单选题)12: I can’t find the key _____the door. Maybe I lost it. A: to B: of C: with D: for ...
要做作业扫码我