题型:问答题 简答题 噬菌体侵染细菌的实验,除证明DNA是遗传物质外,还间接说明了DNA[ ]A.能产生可遗传的变异B.能进行自我复制,上下代保持连续性C.能控制细菌蛋白质的合成 D.是生物的最主要的遗传物质 查看答案
题型:问答题 简答题 The accurate declaration for the export goods is made by the ().A. consignee or his agentB. consignor or his agentC. CustomsD. any person 查看答案