皮皮学，免费搜题
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【单选题】
用碘量法测定水中溶解氧时,应选择溶解氧瓶采集水样,采集过程中应注意,不要使水样在采样瓶内( ),注入水样至溢流。A.
完全充满
B.
避光保存
C.
曝气或者有气泡残存
D.
pH调节至碱性
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皮皮学刷刷变学霸
举一反三
【判断题】Man needs transport engineering because mobility is a basic human need and there is a strong tie between the living standard and transport facilities quality.
A.
正确
B.
错误
【多选题】工程开工之前,安全员应将工程概况、施工方法及安全技术措施,向参加施工的 __进行安全技术措施交底。
A.
工地负责人
B.
技术负责人
C.
工长
D.
班组长
E.
施工人员
【简答题】详述最大摄氧量的影响因素。
【单选题】From the beginning rivers have played an important part in the life of man. Primitive man used rivers as a means of travel. In ancient times, man settled near rivers or on river banks and built up lar...
A.
since the last century
B.
for a very long time
C.
since a few years ago
D.
since a few hundred years ago
【简答题】电话机的传输频带规定为（）到（）。
【单选题】From the beginning rivers have played an important part in the life of man. Man of the earliest times used the rivers as a means of travel. Today rivers still serve as a great waterway for the transpo...
A.
since the last century
B.
for a very long time
C.
since a few hundred years ago
D.
since a few years ago
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