隐蔽已知条件是提高试题灵活性的重要手段,因为隐蔽可以使问题变得扑朔迷离,同时又增加了试题的难度·隐蔽常用的手段是将化学概念、原理、化学式、化学反应、密度等隐蔽起来,人为设置思维障碍,增大试题的迷惑性和解题的干扰,从而诱使考生误入试题人为设置的“陷阱”·一、利用 Covert known conditions is an important means to improve the flexibility of test questions, because concealment can make the question confusing, while increasing the difficulty of test questions. The commonly used means of covert is to conceal the chemical concept, principle, chemical formula, chemical reaction, density, etc. , artificially setting obstacles to thinking, increasing the confusion of the questions and the interference of problem solving, so as to induce candidates to mistakenly enter the test subject as a set of “traps”.