使用按键如何进行防抖？
A. 硬件电路防抖
B. 软件防抖
C. 更换防抖按键
素质教育的基础就是成人教育，是成为人的教育，而不是成年人的教育。
A. 对
B. 错
Understanding a conversationDirections: Listen to a conversation and choose the best answer from the four choices provided for each question.[音频]
A. He’s going to work.
B. He’s going shopping.
C. He’s going home from work.
D. He’s going to school from home.
2
A. He studies the next day.
B. He has no time to study.
C. He stays up all night to study.
D. He studies when he’s not exhausted.
微信支付 
支付宝支付