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汇率是指一国货币相对于另一国货币的价格，也是一种（）
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实施监测的方法包括（）
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用密度为1.84g/cm398%的浓硫酸配制0.5mol/L的稀硫酸250ML，需浓硫酸（）mL。
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滨海沉积物一般比湖泊和河流沉积物的分选要好。
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下面对亲子沟通平行小组的理解，正确的是（）。
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引起核黄疸的血清胆红素浓度一般超过（）
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（），就是注重个人修养，待人接物要文明礼貌，不做粗俗鲁莽、有损社会公德的事。
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急腹症的病人腹腔内穿刺液为带臭味的血性液，最可能为（）。
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单核吞噬细胞系统功能受损可诱发DIC是由于（）。
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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.