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11.C该图不能表示pH对种子细胞呼吸速率的影响,在较低的pH条件下,与细胞呼吸有关的酶已经失活,种子不再进行呼吸作用,A错误:该图横坐标不能表示氧气,且c点时,该种子细胞不进行有氧呼吸,但可以进行无氧呼吸,所以呼吸速率不会为零,B错误:酶发挥作用时具有最适的温度,温度影响呼吸速率实际是通过影响与呼吸有关的酶活性来实现的,C正确:若X表示水分,则该种子细胞内a点时的结合水/自由水的比值大于b点,D错误。
书面表达One possible version:Our oceans.our respomsibilityJune 8th was named by the UN in 2009 as World Oceans Day.Obviously,it attaches great importance toocean protection.Oceans are to human beings what water is to fish.Not only do they provide us with abundant resources.but they also play an important role in maintaining the balance of our ecosystem.Unfortunately.as our cconomyadvances,recent years have seen the oceans being polluted.Therefore,it is high time that we took measures toprotect the oceans.Countries should team up with one another to work out practical plans regarding oceanprotection.Individuals should enhance the awareness of ocean protection.It is my firm belief that only with jointefforts can we have a better future.