北師大版英語(yǔ)高二下冊(cè)u(píng)nit22environmentalprotectionword學(xué)案1-資料下載頁(yè)
2024-12-03 00:31本頁(yè)面
【導(dǎo)讀】,做時(shí)間狀語(yǔ)時(shí),常與。②seenas是過(guò)去分詞短語(yǔ)做____語(yǔ),修飾______.
【正文】 ientists measure the amount of carbon14 in a fossil to figure out how long ago the plant or animal died. Some food is preserved with radiation. some people worry that this process may not be safe. They wonder if it changes the food. Studies are being done to try to find answers. As in every good science process, the debate continues. 1. Which one is not true about radiation? ( ) A. Radioactivity can be used in many ways. B. With radiocarbon dating, we could know the possible year when a dinosaur died billions of years ago. C. Radioactivity could make contribution to people though it is dangerous. D. Food preserved with radiation may not be safe because it is changed by radiation. the meaning of the underlined word. tumors. ( ) A. medicine B. illness C. cancer D. cells best title for this passage should be ________.( ) A. The many uses of Radioactivity B. Radioactivity and cancer C. Radiocarbon dating D. Radiation is harmful. 小結(jié)與反 思 :_______________________________________________
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