降雨到达地面后,经过植物截留、地面填洼、___和蒸散发等环节,剩余的雨量便成为___。
地面点的相对高程是由________起算的地面点高程。
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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