Gasoline fumes tend to（）. ["settle near the bottom of the bilge","settle near the top of the bilge","settle evenly throughout all levels of the bilge by mixing with air","disperse to atmosphere"]
在“查看”菜单的“排列图标”命令的子菜单中，（）不是它的排序命令。 ["文件名称","文件大小","文件内容","文件日期"]
为什么通常碳钢在水中淬火，而合金钢在油中淬火？若合金钢在水中淬火会怎样？
严重的萎缩性胃炎患者常发生恶性贫血，其原因是：（） ["回肠中铁的吸收受到抑制","十二指肠中葡萄糖的吸收受到抑制","回肠中维生素B12的吸收收到抑制","十二指肠中蛋白质的吸收受到抑制"]
The most critical part of the bunkering operations, which can result in an oil spill, is when the （） ["hose joints are made up","tanks are being topped off","system is being lined up","pumping operation is first started"]
解释水产养殖疾病预防中的“四消法则”。
