显示器的VGA接口中的①、②、③孔为（）。
A、RGB模拟信号输入
B、RGB数字信号输入
C、行、场同步信号输入
D、DDC脉冲
参考答案：A
Around 15,000 officials gathered in Copenhagen, trying to map out an effective strategy _____ the battle against climate change．
A．to win
B．will win
C．winning
D．won
The little girl _______her breath in a long sigh when she learned that none of her friends let out her plan to run away from her family with her boyfriend to her parents. [ ]
A. send out
B. make out
C. let out
D. bring out
