实验室用MnO₂和浓HCl加热制取Cl₂时，有14．6gHCl被氧化，将所得气体全部用石灰水吸收，可得漂白粉质量是

某些金属卤化物可跟其卤素反应，如KI＋I₂KI₃（KI₃易溶于水）。下列推断错误的是

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    Two weeks after the conclusion of the hit show Chinese Poetry Competition, a new program, Readers, has become a nationwide stir. ____(broadcast) on CCTV over the weekend, it is arousing fresh ____(enthusiastic) for literature in China.
    The weekly talk show, produced and hosted by famous TV personality Dong Qing, ____(invite) people from all walks of life ____(read) aloud parts of poems, essays and books that they like or wrote. The participants also share stories from their own life explaining ____particular pieces touched their hearts or shaped their lives.
    Five days after____(it) first show on CCTV-1 on Saturday, Readers has been rated 9.2 points out of 10 on Douban, one of China's most popular review sites. Internet ____(use) have praised it as a breath of fresh air among variety shows in China, a refreshing change from the usual dance and singing shows that dominate live television.
    But the success of these programs is just like a vane, through which we can see that there is ____huge demand of cultural show in the public. In today's television world ____reality shows have dominated, this is very____encourage).

小刚用图所示电路探究“一段电路中电流跟电阻的关系”。在此实验过程中，当A、B两点间的电阻由5Ω更换为10Ω后，为了探究上述问题，他应该采取的唯一操作是（   ）

一个均匀实心物体与弹簧（所受重力和浮力均不计）的末端相连，浸没在液体中处于静止状态．可以根据物体的密度ρ₁与液体的密度ρ₂之间的关系，对弹簧长度L与原长L₀的关系作出判断，请利用学过的科学知识，推导出这些关系．（推导中要求写出依据）