关于化学史描述正确的是（ ）A法国化学家拉瓦锡1771年建立燃烧现象的氧化学说B拉瓦锡最早发现电子的科学家C汤姆生提出了质量守恒定律，测定出空气的成分D意大利化学家凯库勒最早提出了分子概念

下列说法正确的是（  ）。A一定条件下某吸热反应能自发进行，说明该反应是熵增大的反应 B增大反应物浓度可加快反应速率，因此可用浓硫酸与铁反应增大生成H2的速率   C催化剂可加快反应速率并影响平衡的移动 D增大反应物固体的量可促使平衡正向移

下列过程放出热量的是（ ）A液氨气化B钠与水反应C碳酸钙分解D化学键的断裂

​​​​​​​A3.2B0.2C​​​​​​​D​​​​​​​

下列关于金属的说法中，不正确的是（ ）A铜有良好的导电性，常用于制作导线B所有的金属都能与稀盐酸反应C铁制品在干燥的空气中不易生锈D不锈钢具有较强的耐腐蚀性，可用于制作医疗器械

下列实验，说法正确的是（）。A​​​​​​​B​​​​​​​​​​​​​​C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​​​​​​​​​​​​​​

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

Around two o’clock every night, Sue will start talking in her dream. It somewhat ________ us.AbothersBhad botheredCwould

_______ your valuable help, we couldn’t have finished the experiment ahead of time.AIf it were not forBHad it not been f

Such animals as South China tigers are believed_______, for we’ve had no track of them for ages.Abecoming extinctBto bec

The_______ of the system of regional autonomy for ethnic minorities has underground long periods of exploration and prac

In the south, one effect to the development of the oil industry might be _____.Aa large reduction on unemployment.Ba gro

材料全屏                                  The Law to Keep the Oil Industry under Control    The Norwegian Government is doin

An aspirated p, an unaspirated p and an unreleased p are __________ of the p phoneme.AanaloguesBtagmemesCmorphemesDallop

According to Searle, the illocutionary point of the representative is ______. Ato get the hearer to do something Bto com

_______deals with language application to other fields, particularly education. ALinguistic theory BSociolinguisticsCApp

As far as school assessment is concerned, we have teacher’s assessment, ______and portfolios.Astudents’ self-assessmentB

For better classroom management, what should the teacher do while the students are doing activities?AParticipating in a

Which of the following nominating patterns can a teacher adopt to ensure that all students are activelyinvolved in class

请评价教师课堂话语的质量。（10分）