在变容二极管电路中，中心频率fC为5MHz，调制信号频率为5kHz，最大频偏为2kHz。通过三倍频后，调频系数……

未分类题According to the author, policies adopted by most countries are bad in thatA．they actually force citizens to donate organs.B．the presumed consent is not morally right.C．they fail to increase supply to an expected level.D．people donate organs because it is voluntary.

未分类题Schools considered using summer time most probably because theyA．wanted to help students to make full use of the school calendar.B．disbelieved that their students would actively do summer homework.C．would like to encourage more students to take Advanced Placement tests.D．thought achievements had something to do with efforts in summertime.

判断题评价结果要客观可靠，追求评价的客观性是现代教育评价的基本特点。评价包括描述和价值判断。()

未分类题Peter Singer seems to suggest thatA．we should cast away our logic and respect emotion in the first place.B．we should not only concern about ourselves but start help each other.C．people who live in abundance should give a hand to those in poverty.D．we should cut off life support for the old to achieve the utilitarian goals.

判断题每一个D、FA都对应有唯一的一个NFA。()