How can you know better about the real estate?
A、Surf online for more information.
B、Call and chat for more info.
C、Check aound in person.
D、All of the above.

单项选择题The larger the audience, the____the demand from advertisers at a given price. A、lower B、higher C、invariable D、smallest

单项选择题射极输出器电压放大倍数小1而接近于1，所以射极输出器不是放大器。（）