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【单选题】
听力原文:Interviewer: Helen, was this business always a dream of yours? Woman: New, net really, it developed from what we used to do, build fishing boats. Interviewer: How long have you been in business? Woman: About eight years, first we built the marina, then we bought boats to rent out for cruising holidays! It's going well. Interviewer: How many boats de you have? During the summer I bet you're pretty busy. Woman: Yes, people use them like caravans really, they go up river for their holidays and then bring them back to the moorings here for us to prepare for the next client ... You hear part of an interview with a businesswoman. What is her business?
A.
Hiring out boats.
B.
Hiring out caravans.
C.
Building boats.
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举一反三
【多选题】下列不属于系统误差的是
A.
滴定时溅出溶液
B.
滴定管未经校正
C.
天平的零点突然改变
D.
试样未均匀混合
【单选题】下列不属于系统误差的是
A.
配制溶液的蒸馏水含有少量杂质
B.
某同学实验数据总是偏高
C.
天平的砝码被腐蚀了
D.
实验时滴定管的读数不准
【单选题】下列不属于系统误差的是
A.
配制溶液的蒸馏水含有少量杂质
B.
实验时滴定管的读数不准
C.
某同学实验数据总是偏高
D.
天平的砝码被腐蚀了
【单选题】下列不属于系统误差的是
A.
方法误差
B.
读错刻度
C.
试剂误差
D.
仪器误差
【单选题】下列不属于系统误差的是:
A.
吸量管直径不均匀
B.
液相色谱分析中流动相不纯净
C.
分光光度法中波长不准确
D.
滴定分析中指示剂颜色变化不明显
【单选题】下列不属于系统误差的是()
A.
人为误差
B.
仪器误差
C.
理论误差
D.
操作误差
【单选题】气缸总容积等于气缸工作容积与燃烧室容积
A.
之和
B.
之差
C.
乘积
D.
之比
【多选题】下列不属于系统误差的是
A.
砝码受蚀
B.
天平两臂不等长
C.
称量中样品受潮
D.
观察者对终点不敏感
E.
温度变化对测定有较大影响
【单选题】下列不属于系统误差的是 。
A.
方法误差
B.
试剂误差
C.
记录误差
D.
仪器误差
【单选题】下列不属于系统误差的是:
A.
吸量管直径不均匀
B.
液相色谱分析中流动相不纯净
C.
分光光度法中波长不准确
D.
滴定时有液滴溅出
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