OTDR测试仪使用时常用的折射率是：（）
A.1.4675
B.1.4670
C.1.4672
D.1.4672
参考答案：A
He said he didn’t regret telling the truth but felt that he ______ it differently.
A．could have expressed
B．could express
C．must have expressed
D．would express
进行酒的尝评的意义和作用是什么？
