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以下属于身体成分检测的是
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以下属于身体柔韧性检测的是
BMI（中国标准）的正常范围是
_____ 1. The corn-flake packet is cheaper than high grade card._____ 2. There are a lot of materials which can be used for making paper, but the superiority ones are soft wood, cotton and rags._____ 3. During the whole manufacturing process, the final product is made from a pulp of cellulose fibres._____ 4. In order to make white paper and card, the makers will add bleach._____ 5. Lignin is essential for the tree but it will make paper easy to break._____ 6. Many paper producers will preserve lignin during manufacture, because leaving the lignin will make more paper from a tree._____ 7. Acid is particularly harmful to photographic materials._____ 8. If the lignin is removed from the paper, the paper will be more expensive._____ 9. Although free of lignin, paper made from cotton and rag waste can also cost more money than wood pulp paper because there is much less cotton and rag than trees._____ 10. What we can learn from "Paper from Rag" is that you had better buy archival materials from specialist suppliers.
_____ 1. You should take steps to recover from computer disasters so as to minimize their effects._____ 2. For some reason, computer disaster recovery is always ignored by many of us._____ 3. You can bounce back quickly and easily minor computer disasters with the help of a good offsite storage plan and the right tools._____ 4. The most devastating causes of personal computer destruction includes house fires and floods._____ 5. It's necessary for us to back up our systems to some transferable medium and to put it somewhere else._____ 6. You should find a distant place to store your backups after selecting your tools and a suitable medium._____ 7. Not only physical disaster can damage your computer._____ 8. The backup and recovery tools must be flexible enough to deal with various computer crises._____ 9. The quality of your backup tools determines whether you are frustrated or have a peaceful mind when disaster strikes._____ 10. You should prepare for your computer disasters now and again.
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