衡水金卷先享题 2024-2025高三一轮复习40分钟周测卷(H)/化学(一)试题

衡水金卷先享题 2024-2025高三一轮复习40分钟周测卷(H)/化学(一)试题,衡水金卷先享题2025答案网收集整理衡水金卷先享题 2024-2025高三一轮复习40分钟周测卷(H)/化学(一)试题得系列试卷及其答案，查看更多衡水金卷先享题高三一轮复习周测卷答案请关注我们！请关注WX公众号：趣找答案

衡水金卷先享题2024-2025高三一轮复习40分钟周测卷答案专题合集

bread for breakfast in the morning.Then I go to school.I have chicken
不
六、请为下列句子选择合适答语的序号。(5分)
and vegetables for my lunch at school.I go home in the afternoon.I
)1.How much is a donut
have fish and rice for my dinner.And I read a book in the evening.
()2.What would you like

The tooth-cleaning robot works thanks to two magnets (磁铁). One goes on each side of the teeth. The nanoparticles sit in a water-based solution between the magnets. When the magnets are turned off, the nanoparticles float randomly in the solution. As soon as one magnet gets turned on, the nanoparticles clump together near its center. When you turn on the other magnet and turn off the first one, the nanoparticles extend outward in long, skinny bristles.
When there’s a tooth in the way, these bristles can’t stretch out as far as they want. So they push against the tooth’s surface. If there’s a gap between teeth, they push into the gap. Moving the magnets makes the bristles move against and between teeth.
Besides, as a bonus, the nanoparticles can kill what harms the teeth and keep them health y because it contains something commonly added to toothpaste and mouthwash.
The new invention is just a proof of concept. The researchers still need to turn it into a product that people will want to use. It must fit comfortably and safely in people’s mouths. It can’t draw too much power or cost too much. “There’s a lot of engineering to get from here to there,” says Steager. But he adds, “every good idea needs to have a start.”
32．What is a feature of the bristles
A．They can be solved into water. B．They can change shapes.
C．They only work in liquid. D．They feel much softer.