【单选题】【消耗次数：1】
扩音机与信号源联接时要注意( )匹配。
①
功率
②
阻抗
③
电压
④
电流
参考答案：
复制
纠错
➡️如需代学继续教育，联系微信：yizhituziang
相关题目
【单选题】
下列关于信号源的用途，正确的是_______。?
①
激励源、信号仿真、频谱纯度高
②
激励源、信号仿真、频谱纯度低
③
激励源、信号仿真、标准信号源
④
频谱高、信号仿真、标准信号源
【单选题】
在给方向阻抗继电器的电流、电压线圈接入电流电压时，一定要注意不要接错极性，如果接错极性，会发生方向阻抗继电器（）的后果。
①
拒动
②
误动
③
正向故障拒动或反向故障误动
④
损坏
随机题目
【简答题】
中国的先进分子为什么和怎样选择了马克思主义？
【单选题】
2.Themansaidhewas____employeeof____gascompanyandcametoread_____meter.
①
a; a; a
②
the; the; the
③
a; a; the
④
an; the; the
【单选题】
3. ____teacher came in and there was _____ book in his hand.
①
The; a
②
A; the
③
A; a
④
The; the
【单选题】
3.Iveread_______sportsnewsabouttheF1racetoday.
①
two
②
pieces
③
two pieces
④
two pieces of
【填空题】
Direction: Fill in the blanks with the wordsor phrasesgiven below. Change the form if necessary.[tender; suffer; in anxiety; crave; choke; plague; with a sigh; dull; nonsense; threshold]6. He was carried away by the[填空1].
【填空题】
Direction: Fill in the blanks with the phrases given below. Change the form if necessary.[have access to; go off; desperate for; put up with; always the case; give advice; concentrate on; arrive at; make an effort; come in handy]5.Ill have to[填空1]the noise till I move next week.
【填空题】
Direction: Fill in the blanks with the words given below. Change the form if necessary.[hug; flatten; ancestor; amazing; solemnly; comfort; awful; desperately; uproot; cousin]9. The government were to[填空1]all its troops from the region.
【填空题】
Direction: Fill in the blanks with thephrases given below. Change the form if necessary.[ought to; look forward to; in wonder; give way to; look down; on the way to; reach out; put one’s arm around; trip over; cut into]4. If you dont lace up your shoes, youll[填空1].