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系统误差包括 、 、 、 。指示剂变色点与化学计量点不一致属于 误差;蒸馏水中含有杂质属于 误差;称量时砝码数值记错属于 误差;称量完成后发现砝码破损属于 误差;滴定管读数最后一位估计不准属于 误差。
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【单选题】听力原文： The origin of Earth's moon, the largest moon in the solar system, is still something of a mystery. There are some theories about its origin however. Now, keep in mind that a theory of the moon's...
A.
Differences between the planets in the solar system.
B.
Methods of determining the composition of Earth and the Moon.
C.
Why Earth has an iron core.
D.
The origin of the Moon.
【简答题】社会市场营销观念认为，企业的一切活动必须将______、______和社会利益三者有机地统一起来。
【单选题】听力原文： The origin of Earth's moon, the largest moon in the solar system, is still something of a mystery. There are some theories about its origin however. Now, keep in mind that a theory of the moon's...
A.
In a geography class.
B.
In an astronomy class.
C.
In a geology class.
D.
In a biology class.
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