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Each of us should _______ aside a few minutes to have a rest every day.
Police are ________ the disappearance of two children.
He ________ his poor judgment ________ Jet Lag.
Washing the food down with water as a substitute ________ chewing is not a good habit
普通水准测量,应在水准尺上读取()位数。
对某边观测4测回,观测中误差为±2cm,则算术平均值的中误差为()
在三角高程测量中,采用对向观测可以消除()的影响。
转动目镜对光螺旋的目的是()
下列四种比例尺地形图,比例尺最大的是()
钢尺的尺长误差对距离测量产生的影响属于()
对高程测量,用水平面代替水准面的限度是()
高差与水平距离之()为坡度。