>DRAPL预酸洗段可采用中性盐电解还可用硫酸酸洗。

食品保鲜可以防止食品腐坏，保持食品的营养和味道。食品保鲜的措施有添加防腐剂、充填气体、放置干燥剂和脱氧保鲜剂等。

（1）某脱氧保鲜剂主要成分为活性铁粉，利用铁与氧气、水反应生成氢氧化铁，来吸收包装袋中的氧气，从而延长食品的保质期。该反应的化学方程式为______________________。

（2）已知该脱氧保鲜剂中活性铁粉的质量为1.4 g，计算该脱氧保鲜剂最多能够吸收氧气_____________g。

Edmund advertised his car in Public Eye, a local newspaper. In response to the advertisement, John called on Edmund on 1 June and offered him R10,000 for the car. Edmund was rather doubtful about John’s ability to pay for the car, but nevertheless agreed to sell the car to John and accepted John’s cheque for R10,000. Edmund allowed John to take the car away and asked his bank to seek immediate payment of John’s cheque. John’ s cheque, however, was dishonoured and on 2 June, Edmund asked the police to recover the car. On 4 June, John sold the car to an unsuspecting Sandy, who bought it in good faith. The police have now been in contact with Sandy concerning the car.Required:In the context of the above information, advise Edmund in relation to,

(b) Sandy’s purchase of the car. (5 marks)

有人说，民主就像一个旋转的陀螺，重要的是旋转的过程。离开了这个过程，民主的陀螺就会倒下。就民主决策而言，正确的决策结果自然会给人们带来希望和信心，而决策的过程，对人们凝聚信心的影响更大。

这段文字中的比喻意在强调（）。

A．民主决策过程对民主的重要性

B．只有通过民主决策，才能凝聚信心

C．决策过程对民主的重要性

D．有效的参与过程，便是凝聚信心的过程

函数UPPER("12ab34CD")的结果是（ ）。

A．12AB34CD

B．12ab34CD

C．12ab34cd

D．12AB34cd

数值运算包括（）

A.算术运算

B.分类

C.统计运算

D.模拟预测