土壤粘结性
Which of the following best describes the lock protection provided by DB2 for the current row of a cursor?（） ["The cursor is only protected from updates and deletes by concurrent applications.","The row is only protected from positioned updates and deletes that reference another cursor of the same application.","The cursor is protected from positioned updates and deletes that reference another cursor of a different application.","The row is protected from updates and deletes by the current application and from positioned updates and deletes that reference another cursor of the same application."]
衡量人体氧系统功能的强弱除了可用呼吸系统或心血管系统的一些指标外，常用的衡量氧运输系统整体功能的综合性指标就是：（） ["肺通气量","肺血流量","肺泡通气量","最大吸氧量"]
举出在市场营销中常用的几种经营策略。
根据林木用途的不同，我国现有森林主要可以划分为（）、（）、（）、（）等类型。
《中学教师专业标准》要求教师：引导（），培养良好的思维习惯和（）的能力。
