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【单选题】
下列哪种情况可引起系统误差A.
天平零点突然有变动
B.
看错砝码读数
C.
加错试剂
D.
滴定终点和计量点不一致
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The author cites each of the following as possible influences in a Black worker's decision to migrate north in the Great Migration EXCEPT______.
A.
wage levels in northern cities
B.
labor recruiters
C.
competition from rural workers
D.
voting rights in northern states
【单选题】The author cites each of the following as possible influences in a Black worker’s decision to migrate north in the Great Migration EXCEPT______
A.
wage levels in northern cities
B.
labor recruiters
C.
competition from rural workers
D.
voting rights in northern states
E.
the Black press
【单选题】The author cites the American Medical Association's advice in paragraph 4 in order to ______.
A.
present more factual details to clarify the issue
B.
present an alternative theory for consideration
C.
present a recommendation from a reputable source
D.
present a solution drawn from all the evidence considered
【简答题】太阳系中离太阳最近的行星是
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