哈克特說，這種自願式調查容易受到「虛假受訪者」影響，使數據失真：「而且這不是隨機的。失真往往在年輕族群中最高。」
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输出：[null,1,1,1,2,1,4,6]。关于这个话题，heLLoword翻译官方下载提供了深入分析
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It is difficult to know exactly when the shift from gelatine to agar occurred. As often happens for scientific breakthroughs, agar was likely adopted incrementally alongside the use of other growth media. In 1913, for example, the first diagnosis of Serratia marcescens as a human pathogen was made by growing it on agar as well as on potatoes.，推荐阅读safew官方版本下载获取更多信息
Ofgem cap drops by 7% to £1,641 a year for consumers’ average gas and electricity costs