第一节 请认真阅读下列短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项。
A 跨学科 物理
[2025 扬州市邗江区期中]Slides(滑梯) are simple but always fun. All you need to do is climb up to the top and slide down. But did you know that there is science behind it?
Newton said what goes up must come down. He was talking about gravity(重力). Slides work because of gravity. But that is not all.
(续表)
① You climb up the slide and sit down.
You are ready to go. Are you sliding down? No, not yet. Things stay still(静止的) unless something makes them move. It is Newton's first law. So you have to give yourself a push to start the journey down.
② Now you are sliding down.
Do you feel you are slowing down a bit? When two things rub(摩擦) against each other, they cause friction(摩擦力). Without friction, you will slide down faster and faster to the bottom.
③ At the bottom of the slide, you come to a full stop.
Your feet touch the ground and add extra(额外的) friction. Newton's first law also says moving things keep moving unless something makes them stop. So, if you do not use your feet, you'll fly off the slide.
()26. (创新考法·图片理解)Which picture explains why you slow down a bit when sliding down?
A.
()27. What will happen if we don't use our feet at the bottom of the slide according to Newton's first law?
A. We will fly off the slide.
B. We will slide back up.
C. We will stop immediately.
D. We will stay at the bottom.
()28. Where can we probably read the text?
A. In a storybook.
B. In a science book.
C. In a guidebook.
D. In a school poster.
B