A.UT=(Um/cosθ)-Z×tanθ
B.UT=(Um/cosθ)+Z×tanθ
C.UT=(Um/tanθ)-Z×cosθ
D.Um=(UT/tanθ)+Z×cosθ
A.1+α×(Ta-20)
B.1+α×(T1-20)
C.1+2α×(td-20)
D.1+β×(td-20)
A.S×(T2+LBP2)1/2/LBP-D×(T/LBP)2±L×(T/LBP)
B.S×(T2+LBP2)1/2/LBP-D×(T/LBP)2+L×(T/LBP)
C.S×(T2+LBP2)1/2/LBP-D×(T/LBP)2-L×(T/LBP)
D.S×(T2+LBP2)2/LBP-D×(T/LBP)1/2±L×(T/LBP)