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题目：
未知类型
A.产品特色定位
B.顾客利益定位
C.使用者定位
D.使用场合定位
答案：
<查看本题扣1积分>
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过酸洗的带钢延伸率大大降低，在轧制过程中很易断裂或破碎并造成粘辊，即使轧成材以后，其力学性能也很差
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下面哪一个不是教育的要素？（）
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IPSec在哪种模式下把数据封装在一个IP包传输以隐藏路由信息（）
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1965年（）研制成功“宝石路”激光制导炸弹，并用于越南战争。
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机器人自由度是否越多越有利？简单说明原因。
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Choose the best words into the sentences. Sudan is the only male northern white rhino (犀牛) left in the world. That (mean) Sudan, 42, is the last hope for avoiding extinction. (protect) him, officials have placed him under 24-hour armed guard at the OI Pejeta Conservancy in central Kenya. Sudan lives there two female northern white rhinos, Fatu and Najin. Northern white rhinos, can weigh up to 5,000 pounds, were once plentiful across northern and central Africa. (hunter) have killed thousands of rhinos because of high demand for the animals，horns (角). Rhino horns, believed to have medical effects, are used in (tradition) Asian medicines. More than 1,000 rhinos (kill) in 2014 in South Africa alone and fifty-four rhinos in Kenya, which has a much (small) population. Sudan, Fatu, and Najin have had their horns (remove) so that they will not be hunted. People hope Sudan and one of the females will be able to have a baby. Sudan is very old, but scientists will not give up hope.
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钢筋试验批量每批不超过（）t。
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铸造合金的充型能力主要取决于合金的流动性、浇注条件和铸型性质。所以当合金的成分和铸件结构一定时；控制合金充型能力的唯一因素是浇注温度。
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