微机控制系统的抗干扰问题是关系到微机应用成败的大问题。（）
参考答案：对
— I'm sorry I _____ my exercise book at home.
— Don't forget _____ it to school tomorrow, please. [ ]
A. forget, to take
B. left, to bring
C. forget, to bring
D. left, to take
From what he has said, let's make a ________ guess about how the accident happened.[ ]
A. clear
B. sure
C. certain
D. tentative
