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问题 多选题

下列方程式正确的是（　　）

A．2Ag2O

△
.
4Ag+O2↑

B．Cu+FeSO4═CuSO4+Fe

C．2Al2O3（熔融）

电解
冰晶石
4Al+3O2↑

D．2MgO+C

高温
.
2Mg+CO2↑

答案

A．氧化银受热易分解，2Ag2O

△
.
4Ag+O2↑，故A正确；

B．根据金属活动顺序表，铁排在铜的前面，所以铜和硫酸亚铁不反应，不能置换出铁，故B错误；

C．电解熔融的氧化铝，冰晶石作助溶剂，发生反应2Al2O3（熔融）

电解
冰晶石
4Al+3O2↑，故C正确；

D．镁的还原性强于碳，所以氧化镁和碳不反应，故D错误；

故选AC．

听力题

V．Spelling （10 points）

68. To my a____________________ (吃惊)and anger, I found her lying to me.

69.Not all the people know the importance of controlling the g_________________________(增长)of population.

70.Some students find it difficult to remember the changes of the i_______________(不规则)verbs

71.They’re planning a grand c_______________________ (庆祝活动)on Teacher’s Day.

72.He stopped his car to m________________ (确保)sure whether something had gone wrong

73. T________________  is the third day of the week.

74.It’s going to rain. You’d better take an u___________________  with you.

75.He never tells lies; he is an h___________________ boy.

76.English is her mother t______________________.

77.Don’t tie the two piles of wood together, tie them up s___________________.
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单项选择题

工程量清单计价格式中列明的所有需要填报（）和合价，投标人均应填报。

A.总价

B.单价

C.合同价

D.投标价
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