指关节为什么会咔咔作响？“CRACK! CRACK!” What is that sound? If you squeeze (挤压) your knuckles (指关节) together, they will make this sound. Many people think it feels good to do this. But why do our knuckles crack ……

the cracking sound.Experts said that cracking your knuckles too much could make them big and sometimes...Q: What causes the sound when you crack (捏) your knuckles (指 节) and is it harmful?A: Cracking your ……

attention.But you should not crack your knuckles too often. Scientists have found...我们的指关节为什么会发出咔嗒声？词数 174 建议阅读时间 4分钟CHILDREN love to crack their knuckles (指关节). Some like the sound ……

of that health forum. He was unable to answer John's question. "Does cracking your knuckles cause arthritis...."Before knowing whether cracking your knuckles can harm your hands, first, you need to know a bit about ……

?A. What knuckles are made up of.B. How cracking knuckles can make sound.C. Why children love cracking... should do more studies on whether cracking knuckles can harm your hands.(答案见下期) 上期参考答案：1—4 BCDA 5—8 ……

, “Sonic, meet Knuckles. My new BFFAE, best friend forever and ever.” Do you sometimes talk to your...刺猬索尼克：为正义而战！刺猬索尼克：为正义而战！What is your favorite movie? For kids in the US, their answer is Sonic ……

of noise around us. It comes from cars, buildings, factories … even your family! Noise is a great danger to people. Too much loud noise can make people lose their hearing. It can be really bad for us ……

they thought their fingertips and knuckles were. They made some pretty big mistakes.“People... people. Then, they asked the people to point to where they thought their fingertips and knuckles were ……

their fingertips and knuckles were. They made some big mistakes. “People think their hand is wider... collocate with “make” or “do”? Write them in the correct boxes. The first one has been done for you ……

gave the instruction to point to their knuckles (关节) and fingertips with a marker. How did they do... they make for themselves. “This experiment tried to find those maps,” he said.Maybe maps don ……

为什么肚子饿时会咕咕叫？When you are hungry, your stomach will let you know by making some noise. Why?In fact.... If you shake it when there’s only a small amount of water, it will make a loud noise. ……

. Very loud noise can even harm our ears and make us sick.When sounds are loud and annoying, we usually call them noise. Very loud noise can even harm our ears and make us sick ……

. Very loud noise can even harm our ears and make us sick.When sounds are loud and annoying, we usually call them noise. Very loud noise can even harm our ears and make us sick.  ……

in class.活学活用Before knowing whether cracking your knuckles can harm your hands, first, you need to know a bit about your knuckles, the common name for the joints in your fingers.句中的介词before后的knowing是动名词，相当 ……

outside your building) is *counterproductive – the noise becomes a distraction.The researchers asked... noise foster creativity? While a quiet environment may make it easier to *plow through a book ……