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问题 填空题

写出除去下列物质中杂质（其中括号内物质为杂质）的化学方程式

（1）硝酸亚铁溶液（硝酸银）______

（2）氯化钠（碳酸氢铵）______．

答案

（1）除去硝酸亚铁溶液中的硝酸银，实质是除去银离子，可选择用铁置换出银或用氯离子来把银离子转化为沉淀，故答案为：FeCl2+2AgNO3=2AgCl↓+Fe（NO3）2 或Fe+2AgNO3=2Ag+Fe（NO3）2

（2）除去氯化钠中的碳酸氢铵，可根据碳酸氢铵受热易分解的性质而除去，故答案为：NH4HCO3

  △  
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NH3↑+H2O+CO2↑．

听力题

四、单词拼写 (共10小题，计10分)

51. She enjoys p_________ the beautiful scenery.

52. The judge found her g___________ of killing people.

53. A pocket e__________ of the dictionary will come out soon.

54. You must buy a good piano for your son, for he is a g___________ pianist.

55. The restaurant has just e_____________ five new waiters.

56. I’m looking forward to attending my sister’s wedding c______________.

57. Her health broke down under the p______________ of work.

58. The boys a__________ to leave for camping but were stopped by their parents.

59. When his father died, he came into p__________ of a large fortune.

60. There are many art g__________ in New York such as Museum of Modern Art.
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多项选择题 X型题

朱砂安神丸组成有

A.当归

B.生地

C.炙甘草

D.芍药

E.黄连
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