1957-1960年间,遭到政治批判的历史剧是()。
A.曹禺的《胆剑篇》
B.郭沫若的《王昭君》
C.吴晗的《海瑞罢官》
D.老舍的《茶馆》
参考答案:C
小题1:From the information in the picture, we know that Lily was born on ______.
A.June 8, 2005
B.June 22, 2005
C.June 22, 2013
小题2:According to the personal information, we know that Mary Connor lives in .
A.Canada
B.America
C.England
小题3:You can borrow books_________.
A.at 10:30 am on Monday
B.at 10:00 pm on Thursday
C.at 3:30 pm on Saturday
小题4:According to the survey(调查) of 2,000 American online shoppers, ________people shop online from 5pm to 8pm.
A.320. B.640. C.800.
小题5:Which of the following is NOT TRUE?
A.You’d better wear your sun hat to enjoy wonderful sunshine.
B.The boats will take you to different places for swimming.
C.Mr Smith and his child need to pay $160 for the tour.
某课外活动小组用如图所示的实验装置探究氯气与氨气之间的反应。其中A、F为氯气和氨气的发生装置,D为纯净、干燥的氯气与氨气反应的装置。
请回答下列问题
(1)实验室用二氧化锰和浓盐酸反应制取氯气,同时生成二氯化锰和水,写出该反应的化学方程式
________________________
(2)洗气瓶B的作用是_______________。C、E都是干燥装置,其中E中干燥管内所装的试剂是________
(3)反应开始后装置D中出现浓厚的白烟并在容器内壁凝结,活动小组拟继续通过实验鉴定该固体的成分。请你协助他们完成该实验探究。
步骤①:取固体样品加少量水溶解,分装于两支试管中。向其中一支试管中加入浓NaOH溶液,加热,将湿润的红色石蕊试纸放在试管口附近,红色石蕊试纸变蓝,证明该固体中含有________________
步骤②:________________________
(4)从绿色化学的角度考虑该装置中有一明显不合理之处,请你提出改进的意见。
________________________________