【单选题】The movie Jurassic Park was a big hit, with its novel idea ___________ a mixture of fear and excitement into people’s hearts.
【简答题】晶体管电路如下图所示,已知E=12V,Uce=6V,Ube=0.7V,R=4.7kΩ,RRP=5kΩ(接入有效电阻为2kΩ),REL=30Ω,试确定电路中各点电位;计算各元件两端电压和流过电流;晶体管的放大倍数。(计算结果保留2位有效数字)
【单选题】Who is Michael Crichton?
A.
The assistant director of Jurassic Park.
B.
The producer of Jurassic Park.
C.
The author of the original book of Jurassic Park.
D.
The boss of Steven Spielberg.
【简答题】已知 如图 所示电路中,晶体管 β =100 , =1.4kΩ 。 (1) 现已测得静态管压降 U CEQ =6V ,估算 R b ; (2) 若测得 和 的有效值分别为 1 mV 和 100 mV ,则负载电阻 R L 为多少?
【多选题】如图所示电路中晶体管的β=100,rbe=1KΩ,(1)现已测得静态管压降Uceq=6V,请估算Rb约为多少KΩ?(2)若测得Ui和Uo的有效值分别为1mV和100mV,则负载电阻RL为多少KΩ?
【单选题】The popularity of films such as Jurassic Park, a scientist clones several kinds of extinct dinosaurs, proves how the idea struck a mixture of fear and excitement into people’s hearts.
【单选题】关于十五络脉,说法错误的是:
A.
十二经脉和任、督二脉各自别出一络,加上脾之大络
B.
十二经脉的别络均从本经四肢肘膝关节以下的络穴分出,走向其相表里的经脉
C.
沟通了表里两经的经气,补充了十二经脉循行的不足
D.
躯干部的任脉别络、督脉别络分别沟通了头颈、腰骶部经气