防毒面具中,()只适用于小范围任何种类和任何浓度下的有毒气体长时间使用。
A.长管式防毒面具
B.供氧式防毒面具
C.防毒口罩
D.过滤式防毒面具
参考答案:A
They desired that they _________ the right to attend the meeting. [ ]
A. had
B. have
C. are
D. were
将订单别拣取和批量拣取组合起来的是()拣取方式。
A.综合
B.订单与批量
C.复合
D.联合