当被测量的函数形式为:Y=A1X1+A2X2+„+ANXN,且各输入量不相关时,合成标准不确定度uc(y)()。
A、
B、
C、
D、
参考答案:D
–How do you learn English so well?
–____ chatting with my uncle in America online.
A.For
B.By
C.In
D.With
I asked the boss for a month’s holiday and, _____ it or not, he agreed.
A.believe
B.to believe
C.believing
D.believed