管道光缆固定时光缆曲率半径大于光缆外径()倍,施工时大于光缆外径()倍
参考答案:20、15
All of ____ sudden, he remembered ____ certain man called his name on his way to work. [ ]
A. a; the
B. the; a
C. /; a
D. a; a
在集成创新中,把各个元件整合并连接成为一个整体的知识称为()。
A.技术知识
B.建构知识
C.集成知识
D.元件知识