当室内外负荷增大,要降低空调风柜的出风温度的措施是()
A、开大电动二通调节阀
B、关小比例式电动二通调节阀
C、将风机三速开关置于高档
D、采用无级自动调节提高风机转速
参考答案:C
In this victory speech ________ before a huge crowd of his supporters, Obama declared that “Change has come to America”.
A.delivered
B.to be delivered
C.having delivered
D.delivering
1(ha)公顷等于()m2。
A.666.67
B.104
C.38
D.26.67