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【判断题】
设置窗体背景颜色的属性名称是BackColor。A.
正确
B.
错误
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举一反三
【简答题】A．The density of the water droplets in the air. B．The size of the water droplets. C．The temperature of the water droplets. D．The purity of the water vapor.
【单选题】All the _________ things need air and water. Without air or water, nothing can stay _______.
A.
living; living
B.
living; alive
C.
alive; alive
D.
alive; living
【简答题】Air is to man what fish to water.
【简答题】The water circle refers to the ______ of water from land to sea to air and back again.
【单选题】The purpose of an air compressor unloading device is to _____.
A.
drain water from the air receiver
B.
drain water from the cylinders
C.
delay the compression process until the motor is up to speed
D.
check pump alignment
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