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紫外线可以用来杀死肿瘤细胞,治疗疾病。()

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简述金融期货交易的风险防范机制。

?Write a memo to your company's department heads:
?explaining why you looked for a new supplier.
?saying who the new supplier is.
?asking for feedback about the goods that they supply.
?Write 40—50 words.

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There is a misconception among consumers that, if they want to pick out tile best products, they should _______.

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