如图所示，将两个相同的弹簧测力计的挂钩挂在一起，然后用方向相反、大小为20N的两个力拉弹簧测力计，则两个弹簧测力计的示数分别为F_左=____，F_右=____。

小刚的父亲感觉身体不适，化验尿中有血细胞，请判断，他父亲可能患有（　　）

①要找到适合自己的休闲方式                           ②能获得精神上的慰籍，放松紧张的心情

③能解除体力上的疲劳，恢复生理的平衡       ④要做到科学、合理、有度

    Henry is nine years old. It is half a kilometer from his home to school, so he goes to school on foot every day. He usually gets home at five in the afternoon.

    It was Thursday, and he came home one hour late. When he came home, his mother asked him, “Why are you late, Henry?”

    “My math teacher Mr. Smith is very angry (生气的）with me and asks you to go to his office tomorrow.”

    “Why does Mr. Smith ask me to go to his office?” his mother asked. “He asked us a question and no one could answer it, but I could.”

    “What a clever boy! Then what was his question?” his mother asked with a big smile.

    “His question was ‘Who put some ice-cream on my chair and made my trousers dirty? "said Henry.