将被保护金属设备与直流电源的负极相连,依靠外加阴极电流进行阴极极化而使金属得到保护的 发布时间:2020-05-15 13:44 │ 来源:www.tikuol.com 题型:单项选择题 问题: 将被保护金属设备与直流电源的负极相连,依靠外加阴极电流进行阴极极化而使金属得到保护的方法为()。A.牺牲阳极保护B.阳极保护C.牺牲阴极保护D.阴极保护
题型:单项选择题 看图,根据首字母提示填空完成下面的短文。 Now Jenny and Danny are w___________ TV. Jenny is s___________ on a c___________. Danny is sitting b___________ her. Do you know Lynn and Bob? Lynn is Jenny's s___________ and Bob is Jenny's b___________. They are playing. Are they playing l___________ or quietly? Shhhhhhh! They are playing quietly. Everyone i___________ quiet. 查看答案