单选题:下列实验,说法正确的是()。ABC用苯萃取溴水中的溴,得到的溴的苯溶液从分液漏斗的上口倒出D 题目分类:中学教师资格证试题 题目类型:单选题 查看权限:VIP 题目内容: 下列实验,说法正确的是()。ABC用苯萃取溴水中的溴,得到的溴的苯溶液从分液漏斗的上口倒出D 答案解析:
生活中处处有化学,下列说法不正确的是()。A可用肥皂水鉴别硬水和软水B煤、石油、天然气是取之不尽用之不竭的能源C铁在潮湿的空气中易生锈D塑料、合成纤维、合成橡胶 生活中处处有化学,下列说法不正确的是()。A可用肥皂水鉴别硬水和软水B煤、石油、天然气是取之不尽用之不竭的能源C铁在潮湿的空气中易生锈D塑料、合成纤维、合成橡胶属于合成材料 分类:中学教师资格证试题 题型:单选题 查看答案
Around two o’clock every night, Sue will start talking in her dream. It somewhat Around two o’clock every night, Sue will start talking in her dream. It somewhat ________ us.AbothersBhad botheredCwould 分类:中学教师资格证试题 题型:单选题 查看答案
_______ your valuable help, we couldn’t have finished the experiment ahead of ti _______ your valuable help, we couldn’t have finished the experiment ahead of time.AIf it were not forBHad it not been f 分类:中学教师资格证试题 题型:单选题 查看答案
Such animals as South China tigers are believed_______, for we’ve had no track o Such animals as South China tigers are believed_______, for we’ve had no track of them for ages.Abecoming extinctBto bec 分类:中学教师资格证试题 题型:单选题 查看答案
The_______ of the system of regional autonomy for ethnic minorities has undergro The_______ of the system of regional autonomy for ethnic minorities has underground long periods of exploration and prac 分类:中学教师资格证试题 题型:单选题 查看答案