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【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
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举一反三
【单选题】Edward was hired to write a story for a television program. According to standard practice, be was hired to write an outline(提纲) for a story first. If the outline was accepted, he would be hired to go...
A.
He should write the story clearly.
B.
He should write an outline to the story.
C.
He should make the television shows.
D.
He should wait for the news from the producer.
【简答题】最早提出“产婆术”的教育家是（ ）