【单选题】位于桂林兴安县境内的灵渠是世界上最古老的运河之一,2007年已被国家文物局列入《中国世界文化遗产预备名单》。而隋朝时开凿的大运河不仅是南北交通的大动脉,也是世界上的伟大工程之一,请说出这条运河的中心是( )
【单选题】A class D amplifier ( ).
A.
conducts through 180° of the input waveform
B.
conducts between 180° and 360° degrees of the input waveform, depending on the amount of dc bias
C.
conducts through less than 180° of the input waveform
D.
works only with digital and pulsed waveforms
【多选题】导游人员对旅游主管部门具体的行政行为不服的,依法享有申请复议权,具体指
A.
对罚款,吊销导游证,责令改正,暂扣导游证等行政处罚不服的
B.
认为旅游主管部门侵犯导游人员人身权,财产权的
C.
认为符合法定条件申请导游人员资格证书和导游证,旅游主管部门拒绝颁发的或不予答复的
【单选题】A class AB amplifier( ).
A.
conducts through 180° of the input waveform
B.
conducts between 180° and 360 ° of the input waveform, depending on the amount of dc bias
C.
conducts through less than 180° of the input waveform
D.
works only with digital and pulsed waveforms
【单选题】Class C amplifier working at ( ) status?
【单选题】A class AB amplifier ( ).
A.
conducts through 180° of the input waveform
B.
conducts between 180° and 360° degrees of the input waveform, depending on the amount of dc bias
C.
conducts through less than 180° of the input waveform
D.
works only with digital and pulsed waveforms
【判断题】导游人员对旅游主管部门的具体行为不服时,享有向人民法院提起行政诉讼的权利。但是,导游人员提起行政复议或者行政诉讼,不影响已经做出的行政处罚的执行。
【单选题】A class A amplifier ________.
A.
conducts through 360 ° of the input waveform
B.
conducts through 180 ° of the input waveform
C.
conducts between 180 ° and 360 ° degrees of the input waveform, depending on the amount of dc bias
D.
conducts through less than 180 ° of the input waveform
【单选题】位于桂林兴安县境内的灵渠是世界上最古老的运河之一,2007年已被国家文物局列入《中国世界文化遗产预备名单》。隋朝时开凿的大运河不仅是南北交通的大动脉,也是世界上的伟大工程之一,请说出这条运河的中心是