[多选题]断路器液压(气动)操动机构的（ ）系统应无渗漏
A.油
B.储能
C.气
D.控制

Perhaps only a small boy trained to be a wizard at the Hogwarts School of Magic could cast a spell so powerful as to create the biggest book launch ever. Wherever in the World the clock strikes midnight on June 20th, his followers will flock to get their paws on one of more than 10m copies of "Harry Potter and the Order of the Phoenix". Bookshops will open in the middle of the night and delivery firms are drafting in extra staff and bigger trucks. Related toys, games, DVDs and other merchandise will be everywhere. There will be no escaping Potter mania.
Yet Mr. Potter’s world is a curious one, in which things are often not what they appear. While an excitable media (hereby including The Economist, happy to support such a fine example of globalization) is helping to hype the launch of J. K. Rowling’s fifth novel, about the most adventurous thing that the publishers have organized is a reading by Ms. Rowling in London’s Royal Albert Hall, to be b
A. determination to promote Potter.
B. consistence in conducting business.
C. high regard for Ms, Rowling’s request.
D. careful restrictions on licensing to Coco-Cola.

"I’ve never met a human worth cloning," says cloning expert Mark Westhusin from his lab at Texas A&M University. "It’s a stupid endeavor." That’s an interesting choice of adjective, coming from a man who has spent millions of dollars trying to clone a 13-year-old dog named Missy. So far, he and his team have not succeeded, though they have cloned two cows and expect to clone a cat soon. They just might succeed in cloning Missy this spring -- or perhaps not for another 5 years. It seems the reproductive system of man’s best friend is one of the mysteries of modern science.
Westhusin’s experience with cloning animals leaves him upset by all this talk of human cloning. In three years of work on the Missy project, using hundreds upon hundreds of dog’s eggs, the A&M team has produced only a dozen or so embryos (胚胎) carrying Missy’s DNA. None have survived the transfer to a surrogate (代孕的) mother. The wastage
A. Its success is already in sight.
B. Its outcome remains uncertain.
C. It is doomed to utter failure.
D. It is progressing smoothly.