为您找到与2021年开封市中招第二次模拟考试化学相关的共 2974 个结果:
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7.【答案】A【详解】A.液晶分子中沿分子长轴方向有序排列,从而表现出类似晶体的各向异性,A正确;B.较高压力、温度和引发剂作用下,乙烯加聚成密度较小的聚乙烯,