题目

下列各种生理现象中,没有涉及到细胞间信息交流的是        A.精子与卵细胞的结合             B.肝细胞表面的糖蛋白结合胰岛素 C.吞噬细胞吞噬细菌               D.兴奋在神经纤维上的传导 答案:D People across China were called on to collect money to help the ________ in Sichuan Earthquake. [  ] A.victims B.farmers C.villagers D.peoples
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