如果未经专门指定，Windows应用程序用来进行打印的打印机名称，被称为（）。 ["默认打印机","可安装的打印机","活动打印机","本地打印机"]
Give all traffic a good safe berth obeying the Int.Rules.This wording is likely to appear in （）. ["Decklogs","Night Orders","Wheel Orders","B\/L"]
更改提出场次时经（）柜员授权。 ["01级","02级","05级","06级"]
研究调节系统动态特性的方法有几种？现场一般采用哪种方法？
（）电刷具有良好的导电性，且载流大。 ["石墨","电化石墨","金属石墨","不能确定"]
什么是短纤维？
