题目

阅读理解 You've gotthe butter, the eggs, the organic salad greens and the laundry soap. And so youmake your way to the front of the grocery store, which is where you'll faceyour moment of truth: Will you stepin behind the mom with a wiggly baby and a full cart? Or take your chances withthe young couple you spotted arguing over the best milk in Aisle 3B? Better makeup your mind, quick. Because, faster than the guy with “just one item” who'sabout to cut in line, this whole scene is going to disappear. Amazonrecently opened its own convenience store, Amazon Go, in Seattle. It's thefirst o 某研究人员模拟肺炎双球菌转化实验，进行了以下4个实验： ①R型菌的DNA＋DNA酶→加入S型菌→注射入小鼠 ②S型菌的DNA＋DNA酶→加入R型菌→注射入小鼠 ③R型菌＋DAN酶→高温加热后冷却→加入S型菌的DNA→注射入小鼠 ④S型菌＋DNA酶→高温加热后冷却→加入R型菌的DNA→注射入小鼠 以上4个实验中小鼠存活的情况依次是 [　　] A．死亡，存活，存活，存活 B．死亡，死亡，存活，存活 C．存活，存活，存活，死亡 D．死亡，存活，存活，死亡