-
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.
-
在法兰的压力等级中，PN2.5表示（）。
-
在编图过程中，规定人数达到1000人以上的居民点则选取，低于此标准的则舍去，这种方法称为（）。
-
在国境铁路分界站向国外铁路交出的重车（不包括分界站装车交出的重车），按（）。
-
公房在初始登记审查时，核准红线说明书，如新建房屋原址上有拆除的旧房屋，已办理过房屋产权证的是否需要将原房屋产权证灭籍？
-
《生活饮用水卫生标准》（GB5749-85）规定生活饮用水中氟化物标准值为（）。
-
在长度一定的管模上，采用螺旋缠绕和/或环向缠绕工艺在管模长度内由内至外逐层制造管材的一种生产方法。我们称为什么工艺？
-
简述耳鼻喉科手术麻醉的特点有哪些?
-
学生认知方式的差异表现在哪些方面？
-
阿奎那