离子交换剂由()、()和()组成。平衡离子带()为阳离子交换树脂,平衡离子带()称阴 发布时间:2020-01-31 04:08 │ 来源:www.tikuol.com 题型:填空题 问题: 离子交换剂由()、()和()组成。平衡离子带()为阳离子交换树脂,平衡离子带()称阴离子交换树脂。
题型:填空题 Computer hardware engineers research, design, develop, and test computer hardware and supervise its manufacture and (72) . Hardware refers to computer (73) , circuit boards, computer systems, and related equipment such as keyboards, modems, and printers.A.fixingB.buildingC.settingD.installation 查看答案