题目

-Which book do you think is the most interesting? -The one _________ by Lu Xun. A. having been written B. being written C. written D. which have written   答案：C  正确掌握化学用语是学好化学的基础。下列化学用语中正确的是 A．乙烯的结构简式为CH2CH2                  B．葡萄糖的实验式（最简式）为 C6H12O6 。 C．Ca2+的结构示意图为                  D ．NH4Cl的电子式为