口罩使用多少分钟后其浸渗细菌可成为污染源A.5min B.10min C.15min 发布时间:2017-06-10 01:48 │ 来源:www.tikuol.com 题型:单项选择题 问题: 口罩使用多少分钟后其浸渗细菌可成为污染源A.5minB.10minC.15minD.20minE.25min
题型:单项选择题 腰围由布料或软皮革制成腰束,内加金属支条以增加强度,其作用包括()A.减少腹压、增加腰椎活动、减轻椎体承重B.减少腹压、限制腰椎活动、减轻椎体承重C.减少腹压、限制腰椎活动、增加椎体承重D.增加腹压、限制腰椎活动、减轻椎体承重E.增加腹压、增加腰椎活动、增加椎体承重 查看答案
题型:单项选择题 The registrar had decided not to enter the black people’s names in the voting book.A.TrueB.False 查看答案