工作分析人员中最关键的是（）。
Which precaution should be taken when testing a line throwing gun?（） ["Never remove the line from the rocket","Fire it at an angle of approximately 90 degrees to the horizon","Wear asbestos gloves","All of the above"]
一份完整的工作说明书内容的第一部分应该是（）。
Which portable fire extinguisher should be used on a class C fire on board a vessel?（） ["Carbon dioxide","Water (stored pressure)","Foam","Carbon tetrachloride"]
通信平台应采用一体化的呼叫中心通信解决方案是（） ["集成页面振铃","来电显示","主动摘机、外呼、调度","呼入"]
试从聚合物性能和熔喷工艺角度，论述获得超细纤维的途径与规律。
