光纤熔接后需要增加专门的保护,光纤接头增强保护最常用的方法是()。
A.金属套管补强法
B.V型槽板补强法
C.紫外光再涂覆补强法
D.热可缩套管补强法
参考答案:D
数据流图的类型有 【4】 和事务型。
Who can tolerate pain much longer
A.People who are listening to an informative tape.
B.People who are listening to light music.
C.People who are listening to something funny.
D.People who are listening to no tape at all.