问题 填空题

阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。    

Chengdu has dozens of new millionaires, Asia’s biggest building, and fancy new hotels. But for tourists like me, pandas are its top(61)(attract).

So it was a great honour to be invited backstage at the not-for-profit Panda Base, where ticket money helps pay for research, I(62)(arrow)to get up close to these cute animals at the 600-acre centre. From tomorrow, I will be their UK ambassador. The title will be(63)(official) given to me at a ceremony in London.But my connection with pandas goes back (64)my days on a TV show in the mid-1980s,(65)I was the first Western TV reporter(66)(permit) to film a special unit caring for pandas rescued from starvation in the wild. My ambassadorial duties will include(67)(introduce) British visitors to the 120-plus pandas at Chengdu and others at a research in the misty mountains of Bifengxia.

On mu recent visit, I help a lively three-month-old twin that had been rejected by(68)(it) mother. The nursery team switches him every few(69)(day) with his sister so that while one is being bottle-fed,(70)other is with mum-she never suspects.

69()

答案

参考答案:days

实验题

乙醇在一定条件下可被氧化,某同学利用下列装置进行乙醇的催化氧化实验,并检验其产物,其中C装置的试管中盛有无水乙醇。已知乙醛在加热条件下能与新制Cu(OH)2悬浊液反应生成Cu2O。(代表酒精灯)

回答下列问题:

(1)请选择必要的装置,按气流方向连接顺序为               __(填仪器接口的字母编号)(加热和夹持装置已略去)。

(2)B装置的分液漏斗中液体药品是           _(填化学式)。该液体还可以与酸性KMnO4溶液反应产生相同的气体,写出该反应的离子方程式                                                                                               

(3)F装置中的固体试剂是       ,发生反应的化学方程式为                                                   。反应一段时间后移去酒精灯,反应能继续进行,其原因是                                              

(4)A装置和D装置中的实验现象分别为                                                                                                                 

(5)为了提高乙醇的转化率,可以对C装置进行改进,提出你的改进意见                                                                                                                                                                                               

单项选择题