关于井底安全阀试问以下哪个是正确的：（） ["阀开着和阀关着相比阀杆由园筒上伸出","阀关着和阀开着时相比阀杆由园筒尚伸出","与阀的状态无关，阀杆的位置不变"]
农村经济体制改革目标和社会发展目标分别是什么？
In addition to potential cost savings and ROI, which three other benefits are made possible by deploying IBM Maximo Asset Management solutions?（） ["enhanced labor relations","reduced byproducts and waste","improved production through put","improved warehouse productivity","support for regulatory compliance","improved work planning\/coordinatio"]
Which backup option defines a user-defined name for a backup? （） ["FORMAT","NAME","TAG","FORMAT U%"]
团体心理辅导的局限性会表现在（） ["个人深层次问题不易暴露","个体差异难以照顾周全","不适合人际关系适应不良的人","对带团的领导者要求高"]
从自然界中分离筛选菌种方法步骤有（）、（）、（）、（）、（）。
