Who can give me a joke about struggle!

When Yu Qian was a child, he didn't study hard, didn't get good grades and went home. He often lied to his father. His father bought a polygraph ... One day, when Yu Qian came back from the exam, his father asked, What did you get? Yu Qian: 90. Beep, beep ... the polygraph rang. His father asked: to tell the truth, how many points? Yu Qian: 80. Beep, beep, beep ... It's ringing again. His father was anxious: this unfortunate child, to tell the truth, how many points? Yu Qian: 70. Beep, beep, beep ... The polygraph is still ringing. His father trembled with anger: tell the truth! ! ! Yu Qian: 40 ... toot, toot, toot, toot, toot, toot ... His father couldn't help it, saying, you have wasted all my efforts. Why don't you learn from me? At that time, your father got 100 in our exam ... thumped ... the polygraph exploded @ @ $ # * @ #! $!

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