【单选题】【消耗次数：1】
为什么说精液分析结果让我们很不省心?
①
精液质量改变多是非特异性的，不能给出病因诊断
②
精液分析结果只能预测生育潜能，不能与是否生育直接相关
③
精液分析的准确性、标准化及质量控制还很不完善
④
缺乏国人精液参数的正常参考值范围
⑤
以上均是
参考答案：
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【填空题】
在精液冷冻过程种，降温至[填空(1)]℃是形成冰晶最危险的区域，精子在冷冻过程中应[填空(2)] 迅速形成玻璃化，防止精液形成大的冰晶。
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