试述成土素母质的类型及其特点。
进货查验记录内容应包含：（） ["入库日期","产品名称，规格型号","注册证号，生产企业许可证号","生产批号\/序列号，生产日期，有效期","购货者名称"]
没有有效到期日期的信用证，应以最后装运期限作为有效到期日期。
下列物质可造成不可逆抑制作用的酶抑制剂是：（） ["丙二酸","氯磺隆","L-苯丙氨酸","碘乙酸","邻氯西林"]
Your company has a single Active Directory domain. All domain controllers run Windows Server 2003. You install Windows Server 2008 R2 on a server. You need to add the new server as a domain controller in your domain. What should you do first（） ["On the new server， run dcpromo \/adv.","On the new server， run dcpromo \/createdcaccount.","On a domain controller run adprep \/rodcprep.","On a domain controller， run adprep \/forestprep."]
气团
