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Unit 4 [00:02.98]Look into Science!How Can a Paper Have One Side? [00:10.63]A piece of paper has two sidess. [00:15.07]See?This piece of paper has a white side and a pink side. [00:22.44]In this experiment,In this experiment,we make a piece of paper

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[00:03.58]Scientists at work [00:05.32]工作中的科学家 [00:07.05]Speaking [00:08.37]说 [00:09.69]The work of scientists is often discussed. [00:11.92]科学家的工作经常引起争论. [00:14.16]Work in pairs and discuss the advantages and

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Dialogue 1 Jingjing: Mark, did you hear about the twin sisters that drowned in the ocean at Qingdao? 京晶: 马克，你听说了青岛海边溺亡的女孩那件事吗？ Mark: That was all over the news a week ago. What a sad story! Thery were onl

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Today, 21 dead pilot whales were buried on a beach near the town of Coromandel. Another 42 whales managed to swim back out to sea. 63 whales were stranded on the beach about 6am this morning. Most of them were female whales with babies. By the time t

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bimolecular electrophilic substitution

blast fuel injection