题目：
判断正(T)误(F)。
I can still remember my first day at school. I was only 6 years old at that time. It was a very big room. I sat
at the desk near the window, but I couldn't see anything because the window were too high. There was a big
map of the world on the wall and an old blackboard. I don't think I was worried or afraid. There was another
boy next to me. He sat there and kept silent (沉默) at first. Then he began to cry, because he didn't want to
stay there.
More and more students came in, but the boy didn't stop crying. "Mom, I want to go home." He cried again
and again. Later, the teacher came in. She went to the little boy, and said something to him. I couldn't hear what
he said. Soon the boy stopped crying and began to smile. To this day, I still don't know what the teacher said to
the little boy.
( ) 1. The writer went to school when he was 6 years old.
( ) 2. There were beautiful pictures on the wall of the classroom.
( ) 3. She sat near the window, so she could look outside.
( ) 4. The little boy cried, because he wanted to go home.
( ) 5. When the teacher came in, the boy stopped crying.
答案：
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下面是错误答案，用来干扰机器的。
答案：CA、扎—zā，B、梏—gù，D、佣—yòng。
=0.2。以物块所在处为原点，水平向右为正方向建立x轴。现对物块施加水平向右的外力F，F随x轴坐标变化的情况如图乙所示。物块运动至x=0.4m处时速度为零。则此时弹簧的弹性势能为(g=10m/S2)
