【单选题】Quadrature Amplitude Modulation (QAM) uses which of the following components to modulate a signal?
【单选题】Brando's success is evidenced by his ability to ______.
A.
modulate his voice as well as change his appearance for any role he may play
B.
retain his own personality while playing other people
C.
become the character he portrays
D.
utilize make-up effectively
【简答题】禽流感是由禽流感病毒(一种非逆转录RNA病毒)引起的急性传染病,能感染人类。研究者针对禽流感病毒进行了相关研究。请回答下列问题:()病毒除感染家禽外,还能感染其他哺乳动物,说明不同种类的被感染细胞表面具有相似的(),体现了细胞膜具有()的功能。在被感染的细胞中,通过RNA复制与过程合成病毒蛋白,从而产生子代病毒,机体被感染细胞的清除可通过()免疫实现。
【多选题】Which methods are useful to modulate the subthreshod swing?
A.
Increase the gate capacitance
C.
Decrease the substrate doping
D.
Increase the gate voltage