根据短文的理解，选择正确答案。 In two days, I will be turning 30. And I was not looking forward to a new decade (十年). I was afraid that the best years of my life were behind me.
One day, I met with my friend Nicholas. He was a 79-year-old man. He noticed something was different about me and asked if anything was wrong. I told him what I was anxious (焦虑) about and asked him: "What was the best time of your life?"
Without hesitation, Nicholas replied: "Well, Joe, when I was a child in Austria and everything was taken care of for me, that was the best time of my life."
"When I was going to school and learning the things I know today, that was the best time of my life."
"When I got my first job and got paid for my work, that was the best time of my life."
"When I met my wife and fell in love, that was the best time of my life."
"World War Ⅱcame, and my wife and I had to leave Austria to save our lives. When we were together and safe on a ship, that was the best time of my life."
"When I became a young father and watched my children grow up, that was the best time of my life."
"And now, Joe, I am 79 years old. I have my health, I feel good and I am just as in love with my wife as I was the day we met. This is the best time of my life.
、Y、Z在周期表中的位置如图所示，则下列说法正确的是 （ ）
