马克思撰写了《共产主义信条草案》（ ）

多项选择题如图所示共射放大电路的电压增益的相关因素有 A、三极管的电流放大倍数 B、静态工作点变量ICQ C、温度 D、电源电压+VCC E、 CB、CE、CC F、信号源内阻RS

单项选择题One way to force students to speak spontaneously is to ask the actors to come to the front of the class before the teacher tells them the situation. The teacher then explains the situation so that the whole class can hear and gives the actors a few seconds to think about what they will say before they start.