成品、半成品、构配件，在使用前应按规定抽取试样，交检测机构进行复试，复试结果合格方可使用。( )

未分类题In order for the RU-486 pill to be approved for use in such nations as the United States, it is necessary that______.A．the drug be proven absolutely safe for human useB．a consensus be reached in the nation regarding the proper usage of such drugs in a moral senseC．influential opposition groups accept it, opening the way for political feasibilityD．the question of when life begins be satisfactorily resolved and the current health concerns related to the pill clarified

未分类题The main point of the text is that______.A．revising history must be avoided in all situations at all costsB．the revision of history leads to a flawed perception resulting in loss of vital lessonsC．if revision of history goes on, the meaning behind the revised events will lose meaningD．historical revision is an international problem affecting all nations and peoples

未分类题The explanation of the word 'wired' probably indicates that______.A．people always misunderstand the functions of the InternetB．Internet is partly responsible for the vanishing of paper booksC．people call the Internet 'wired world' for a reasonD．Internet will take over the functions of paper books

未分类题The most significant reason for the falling sales of paper books is that______.A．electronic books are taking over more and more market share of paper booksB．people' minds don't have the space for reading due to all kinds of temptationC．bookstores are out of business as people prefer to borrowing books from the libraryD．people think things on the Internet are more worthy of their attention

未分类题According to the text, the followings contribute to the wreck of Titanic except______.A．the company didn't resort to steel rivets in TitanicB．small forges employed by the company lacked good riveting skillsC．some material the company bought was not rivet qualityD．proficient riveters were far from suffice