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Which is NOT true of sparklers？ 查看材料A.They are harm
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Generally it isnt harmful to our ears, when sounds are up to______.A．140 decibelsB．100 dec
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Why is the night flight more harmful？A．Because it is not safer than daytime flight.B．Becau
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In the longer span of the future, what is the most important in reducing harmful emissions
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There is no harm in confronting our disorders or misfortunes. On the contrary, the attempt
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Which of the following is NOT the harm of lacking
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It is well known that smoking is harmful to the health.
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