with the help of smartphones.Day 3Solving wobbly wheels (P6)Choose the answer:1. The main purpose of the first... a suitcase meets with an obstacle, _______.A. the swaying will stop for a moment B. its two wheels ……

that caused the suitcase to sway (摇晃) from side to side. They discovered that if one of the wheels... be the same for any trolley (手推车) with two wheels or blades (桨叶),” Sylvain Courrech du Pont, lead author ……

牙仙来了！故事简介：小狮子掉了一颗门牙。它把门牙挂在了树上，牙仙给了他一个惊喜……Leo is a little lion. "My front tooth (门牙) is wobbly (摇晃的)," he says."Let's see?" says Hippo. "Look ? it is wobbly, it really is!" Leo feels very proud1 ……

– deformable (可变形的) wheels. “Recognizing the uneven ground of older buildings, I equipped (配备) my robot with wheels capable of transforming from circles into triangles,” Zhou said.  Unlike ……

有趣的轮子Wheels help us go.A bus has four wheels.A bike has two wheels.Where else can we find wheels...鞋Have a goCan you name a thing with three wheels? ……

牙仙来了！
. “Let’s see…” says Hippo. “Look – it is wobbly, it really is!” Leo feels very proud (骄傲的). No one else has a wobbly tooth. But at lunchtime, Leo opens his mouth. His wobbly tooth is gone (不见了)! “Where ……

polite.Jack: Too polite?Tom: When we came to a fence (栅栏), he let me go first.JOKEPIERThe wheels firstFather: If this car is made of chocolate, which part will you eat first?Son: I will eat the wheels ……

, well away from wobbly structures. AP ……

,” commented The Washington Post. And for Chinese students, it could mean a *wobbly exchange rate ……

will you eat first?Son: Its wheels (轮子), of course.Dad: Why?Son: Without wheels, it can’t run away ……

奥运自行车
How many wheels does a bike have? Two. But this man has three more on his bike. WHat does it look like now? The five Olympic rings （环）! ……

滑板旅行箱。Look at this suitcase (行李箱). It has three wheels. It can change into (变成) a skateboard (滑板). With this suitcase, you don’t need to worry about your heavy luggage (行李) anymore. ……

Ah, I’m so annoyed! I can’t get the wheels to turn on my bike!It looks like the chain is out of whack. Let me fix it for you.Out of whack: not working properly; broken or damaged ……

最长的怪物卡车Monster trucks have four huge wheels. A couple from the US made the world’s longest monster truck. It is about 9.75 meters long. ……

This is a kitchen. It has many different pieces. People can assemble (组装) it themselves. It has tables and chairs. About 30 people can eat here. There are wheels under the kitchen. It can go anywhere. ……