【单选题】【消耗次数：1】
水准尺的倾斜造成的水准测量读数误差是()。
①
偶然误差
②
系统误差
③
可能是偶然误差也可能是系统误差
④
既不是偶然误差也不是系统误差
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相关题目
【单选题】
下列水准测量误差影响中，属于系统误差的是（ ）。
①
视准轴与水准管轴不平行的误差
②
在水准尺上估读毫米不正确的误差
③
水准管气泡居中不正确的误差
④
水准尺刻划误差
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