哪些货品不允许零库存出库（） ["批号管理货品","先进先出货品","个别计价货品","后进先出货品"]
The shells are secured by means of bearing caps and studs, the necessary clearance being provided by means of （） of different thickness. ["shims","packing","glands","washer"]
划桨时，担任头浆的是（）。 ["船长","划桨技术较好，有独立处理问题能力的","力气大的"]
食品冻藏过程如何防止食品冰晶长大（）。 ["防止温度波动","升高温度融化冰晶","温度不宜太低","镀冰衣"]
All straight lines represent great circle tracks on a chart based on a(n) （）. ["Mercator projection","polyconic projection","orthographic projection","gnomonic projectio"]
简述软骨瘤。
