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【单选题】
当两种流体,执交换器中传递热量,进出口温度差相差较大时,则平均温度差可按( )计算。A.
对数平均温度差
B.
算术平均温度差
C.
指数平均温度差
D.
函数平均温度差
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举一反三
【单选题】Two Awoman teachers and four Bgirl students Cwere praised Dat the meeting yesterday.
A.
B.
C.
D.
【单选题】In DAT contracts, a reasonable order for time of shipment and time of delivery is .
A.
July 1 and June 1
B.
June 1 and July 1
C.
June 1 and June 1
D.
July 1 and July 1
【单选题】In DAT contracts, a reasonable order or time of shipment and time of delivery is _______.
A.
June 1 and July 1
B.
June 1 and June 1
C.
July 1 and June 1
D.
July 1 and July 1
【单选题】We at Deluxe Shipping guarantee that your packages will arrive on the ------- delivery date.
A.
expect
B.
expecting
C.
expected
D.
expectation
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