架空配电线路导线的结构总的说可以分以下几类()。
A、单股导线
B、多股导线
C、复合材料导线
D、以上都是
参考答案:D
(F./A,10%,9)=13.579已知,则10年、10%的即付年金终值系数为()。
A、17.531
B、15.937
C、14.579
D、12.579
The small village is said()in a battle during World War 11.
A. to have been destroyed
B. to be destroyed
C. to destroyed
D. to have destroyed