普通水准测量,应在水准尺上读取________位数。
在以________km为半径的范围内,可以用水平面代替水准面进行距离测量。
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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