问题 填空题

阅读对话,根据横线后所给标点符号的提示,在横线上填写适当的句子,使对话完整。

A: Good morning, Sue. Did you enjoy your holiday in the country?

B: Yes,小题1: ________.  And some friends went with us.

A: Where did you stay?

B: In a hotel. And we could enjoy the beautiful scenery from the window.

A:小题2:________. What was the weather like?     

B: The sun shone nearly every day and it didn’t rain at all.

A: Did you like the people there?

B: Yes, they were great. We met some farmers and had some food in their houses.小题3:________? Did you have a good weekend?      

A: Yes. But I just stayed at home.

答案

小题1:we had a great time.

小题2:Sounds good

小题3:How about you?

题目分析:

小题1:针对对方的询问及答语Yes,可知,后面进一步描述玩的开心;故答案为we had a great time.

小题2:针对对方的说法And we could enjoy the beautiful scenery from the window.进行回应,故答案为Sounds good

小题3:最后A描述玩自己的周末后进一步反问B的周末过得怎么样,所以用你呢,故答案为How about you?

实验题

SiO2、SO­2和CO2都是酸性氧化物,它们的化学性质具有一定的相似性;Mg和Na的化学性质也具有一定相似性。某兴趣小组用如图所示装置进行Mg与SO2反应的实验。

(1)选择制取SO2的合适试剂           (填编号)。

①浓HCl     ②浓H2SO4     ③Na2SO3固体     ④CaSO3固体

(2)上述装置还可优化,优化的方法是                                               ,装置C中NaOH溶液的作用是                                   

(3)甲同学推测Mg与SO2的反应与CO2相似,则该反应方程式为                       

               ;乙同学的推测是:2Mg+3SO22MgSO3+S;丙同学的推测是:3Mg+SO22MgO+MgS,要验证甲、乙、丙三位同学的推测是否正确,丁同学作如下实验探究:

已知:MgSO3和MgS都是微溶于水,能与盐酸发生复分解反应放出气体;H2S气体通入CuSO4溶液中出现黑色沉淀。

限选试剂:2mol/L HCl、2mol/L HNO­3、蒸馏水、2mol/LNaOH、品红溶液、澄清石灰水、2mol/LCuSO4;仪器和用品自选。

序号实验步骤预期现象和结论
取少量反应后所得固体于试管中 
向试管中的固体慢慢滴加          

试管口塞上带导管的单孔塞,并将导管通入盛有        的试管中。

若试管中的             

则丙同学推测正确。

若试管中的固体未完全溶解,且            ,则乙同学推测正确。

根据上述实验探究,能证明甲同学推测正确的操作和预期现象是                                                                     

(4)上述实验需要100mL,2mol/L的HCl,配制时选用      (选填10 mL、25 mL、50 mL或100 mL)量筒量取36.5%,密度1.19g/mL的浓盐酸的体积为    mL。(保留三位有效数字)

问答题 简答题