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单位炉容的面积应达到（）m2/m3以上。
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.影响小麦条锈菌潜育阶段的主要环境条件是湿度。
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关于利用磁偏转展宽电子束的特点，下列描述哪项错误（）？
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（）开创了抽象逻辑
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液压支架下柱窝的修复工艺包括（）。
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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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读某河相对流量过程曲线示意图（该河以雨水补给为主），回答下列各题。 该河可能位于下图中的（）
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刺激卵泡生长发育的激素是（）
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甲醇装置晃电，有事故电源的泵是（）。
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学生管理是以“育人”为目的的活动。