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题 1 某医药研究所开发一种新药 ,如果成年人按规定的剂量服用 ,据监测 :服药后每毫升血液中的含药量 y(毫克 )与时间t(小时 )之间近似满足如图所示的曲线(Ⅰ )写出服药后y与t之间的函数关系式 y =f(t)(Ⅱ )据进一步测定 :每毫升血液中含药量不少于 0 .2 5毫克时 ,治疗疾病有
Question 1 A pharmaceutical research institute develops a new drug, and if adults take it according to the prescribed dose, it is monitored that: between the drug-containing amount y (milligrams) per milliliter of blood and the time t (hours) after the administration of the drug is approximately satisfied The curve (I) shows the functional relationship between y and t after administration. The formula y=f(t)(II) is further determined: when the dose per milliliter of blood is not less than 0.25 mg, the treatment There are diseases