某同学利用图1所示装置做“研究平抛运动”的实验，根据实验结果_爱下问搜题

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问题实验题

某同学利用图1所示装置做“研究平抛运动”的实验，根据实验结果在坐标纸上描出了小球水平抛出后的运动轨迹，但不慎将画有轨迹图线的坐标纸丢失了一部分，剩余部分如图2所示，图2中水平方向与竖直方向每小格的长度均代表0.10m，P₁、P₂和P₃是轨迹图线上的3个点，P₁和P₂、P₂和P₃之间的水平距离相等。则点P₂到平抛运动的抛出点O的水平方向的距离_______________，点P₂到平抛运动的抛出点O的竖直方向的距离_______________。（重力加速度取10m/s²）

答案

1.2m，0.8m

完形填空

The best gift I’ve received was from two young boys. At that time, I didn’t have a lot of money or a huge home. As a single mom with three young children of my own, life is so    .
They were boys with dirty faces a bit older than my children, but they always     my yard. I must feed my children who were       thirsty and hungry, so I      a lot of time baking so many healthy muffins（松饼）.These two boys almost grew up in our yard, and they were glad to pray with us before they would have a        with my family.
We would also     food, laughter, books and games with them. And a while later, they       . I didn’t know where they had gone and I often wondered what had     in their lives, and meanwhile I hoped for the best.
During one of the darkest times in my personal life, no one came to visit me. I felt really lonely these days. I even wondered if God had       me. On Mother’s Day, my children    home from school. We were sitting together talking when I heard a     on the door.
I went to answer it, and there stood two clean-faced, tall, smiling boys holding two bundles of beautiful flowers I had ever seen. They said to me “Do you        us? You used to feed us muffins! They were so        . We wanted to come back and thank you and say Happy Mother’s Day     you were really like a       to us!” I was so moved that I couldn’t help crying, and thankedthem again and again.

C．interesting

D．disappeared

选择题

下列没有语病的一项是( )

A．这次活动的宗旨是展现书法艺术形成、发展的历史过程，并以此推动弘扬民族文化优秀传统和建设社会主义精神文明。

B．能否解决“建设一个什么样的党，怎样建设这个党”的问题，关系到建设中国特色社会主义事业最终成功。

C．古老的中国气功已经运用于竞技体育，它可以调节赛前运动员经常出现的紧张情绪。

D．严厉打击仿造伪劣产品的不法行为，是本季度财贸战线的中心任务。