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The ignition temperatures of four substances, P, Q, R, and S, are 175°C, 270°C, 310°C, and 155°C respectively. Which of the following pairs of substances catches fire at 250°C? *1 pointQ and RP and SR and SP and Q |
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Answer» Tu Ty Fj Fh Fuvb Gjgvbh Gjtfvn |
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