【单选题】Preventer bars are fitted on lifeboat releasing hooks to prevent().
A.
the falls from unhooking if the releasing gear is operated accidentally while the boat is being lowered
B.
operation of the release lever until the boat is waterborne
C.
the falls from rehooking after they have been released
D.
accidental unhooking when the falls become slack
【单选题】if语句嵌套使用时,else总是与( )配对。
【判断题】C 语言的 if 语句嵌套时 , if 与 else 的配对关系是:每个else总是与它上面的if配对。
【单选题】if 语句嵌套时, else 总是与( )配对。