【简答题】1 V= mV 100 mV= μV 10^9 μV= V
【单选题】有一台直流标准电压源,说明书上给出的误差技术指标是:1V量程为4×10-6Ux+1.5μV;10V量程为4×10-6Ux+8μV;100V量程为4×10-6Ux+0.1mV,Ux为输出电压值,则相对误差最小的量程是()
【单选题】Dear Mr. / Mrs. We are much concerned that your sales in recent months have fallen considerably. At first we thought this might be due to a slack ( 淡季 ) market, but on looking into the matter more clo...
A.
Due to a slack market.
B.
Due to the general trend
C.
Because he/she is facing difficulties
D.
It is not mentioned in the letter.
【判断题】“累计折旧”账户是用来记录固定资产减少额的。
【简答题】已知一个集成运放的开环差模增益Aod为100dB,最大输出电压峰-峰值Uopp=±14V, 分别计算差模输入电压uI(即uP-uN)为10μV、1mV、1v时的输出电压u。分别等于( )v、( )v和( )V。
【简答题】Conversation 5 A: May I come in, Mr. Li? B: , Miss Wang. I'm very busy now. A: , then? B: Yes, of course. (an hour later) A: now, Mr. Li? B: Well...Mmm... I'm , but...all right. come in. What can I do...
【简答题】从B栏中选出A栏中各句的最佳答语。(答案填选项) A ( )46. What’s your favorite food? ( )47. What time do you get up in the morning? ( )48. Who is your English teacher? ( )49. Why do they like P.E.? ( )50. Does she like math?...
【判断题】混凝土的和易性(也成为工作性),包括流动性和粘聚性两方面的含义。
【简答题】已知一个集成运放的开环差模增益Aod为100dB,最大输出电压峰-峰值Uopp=±14V,分别计算差模输入电压uI(即uP-uN)为10μV、100μV、1mV、1V和-10μV、-100μV、-1mV、-1V时的输出电压uO。