【单选题】---Andy, _________, it’s time to have breakfast. ---OK, mum.
【判断题】熄灭交流电弧最有利的时机是交流电弧电压值最大时。
【单选题】研究表明,当收发信机之间距离超过( )时,UWB系统在信道容量上的优势将不复存在。
【单选题】- Write to me when you get home. - OK, I _______.
【单选题】—Please _____ the computer with something, or it will get dirty easily. —OK, I'll do it right away. [ ]
【单选题】—There is no salt left. Jim, would you like to get ________? —OK, Mum!
【单选题】---I’m going to the supermarket, let me get you some fruit. ---OK. Thanks for your _____________.