题目

Two of the saddest words in the English language are if only. I live my life with the _______ of never having to say those words. The two words _______regret, lost opportunities, mistakes, and _______ . And sometimes the words if only go with _______disasters. Think about how many times you have heard about something awful happening, _______ by if only he had called her back to make sure she was okay.” or “if only I had _______ that noise... or “if only they had made sure the gate to the pool clicked behind them…My father-in-law is _______in our family for saying, “_______ an extra m当自动电压力锅压强过大或温度过高时，发热器都会停止工作．压强过大时开关K过压自动断开，温度过高时开关K过热自动断开，下列表示K过压、K过热和锅内发热器的连接图中，正确的是（　　）