在下列常用的搜索符号中，（）表示“与”的意思，它适用于输入两个以上的关键字。 ["and","not","or","以上全不是"]
在生物医学中能力标准的内容是指（） ["能够理解治疗或研究的程序","能够处理一定量的信息","能够权衡信息的利弊","能够根据这种知识和运用这些能力做出决定"]
Chemical burns are caused by the skin coming in contact with（）. ["acids or alkalies","diesel oil","acids，but not alkalies","alkalies，but not acid"]
传动链误差如何影响加工精度的？决定传动链误差的因素是什么？
Before personnel are lifted from a vessel in a personnel basket，the vessel should be（）. ["directly under the boom","moving away from the boom","stopped dead in the water","tied to the boom"]
简述单品数量需要管理控制的原因？
