What is the first thing you want to do when you see someone yawn(打哈欠)? You want to yawn, too! Yawning is contagious. Scientists have found that all people yawn. Babies start to yawn even before they are born. Th
But they are only sure that when one person yawns, immediately everyone else nearby wants to yawn, too. 1.The underlined word "contagious" in Paragraph 1 means___. A. helpful to our health B. passing from one person to another C. hard ...
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When you see someone yawn, you are likely to yawn immediately. Smiling is also pretty contagious-seeing a smiling person makes you want to smile too.Mirroring body language is a nonverbal way to say “I am like you, I feel the same”. Research shows that people who e...
Also called numb rays, they can inflict a shock powerful enough leave an adult diver temporarily incapacitated. Fortunately, they usually want nothing to do with people.Blue Shark 111 Not all blue sharks are blue. Some, like this 5ft female that I shot off the coast of Southern California ...