成套设备项目设计中交接点复查与核实的方法中错误的是( )。A．应安排时间让所有项目

[三选一选修2：化学与技术]

以黄铁矿为原料生产硫酸的工艺流程图如下：    

(1)沸腾炉中反应的化学方程式为______，该反应中氧化产物是______，在上述流程图E用线段表示出接触室两个出口出来的与制备反应有关的气体成分及去向。

(2)依据工艺流程图判断下列说法错误的是___________。   

a．为使黄铁矿充分燃烧，需将其粉碎  

b．过量空气能提高SO₂的转化率   

c．使用催化剂能提高SO₂的反应速率和转化率   

d．从沸腾炉出来的SO₂需要净化，其目的是防止催化剂“中毒”

(3)硫酸工业是一种易造成多种形式环境污染的工业，但若处置得当，不仅可防止污染的发生，而且能变废为宝。请你提出一种对尾气进行无害化处理的方案（用方程式表示）________；对矿渣的合理利用方法是_________；对沸腾炉中余热的利用方法是__________________________ .

(4)某工厂用500t含硫48%的黄铁矿制备硫酸，若在沸腾炉中有2%的FeS₂损失，在接触室中SO₃的产率为96%，则可得到98%的浓硫酸的质量是______________。   

a.705.6t    b.720 t c.734.7 t    d.750 t

下列不是电子线全身照射需要保护器官的是（）

A.晶状体

B.阴囊

C.指甲

D.肺

E.趾甲

呼吸的意义是[ ]

A．完成组织里的气体交换      

B．吸进氧，呼出二氧化碳

C．分解有机物，释放能量     

D．合成有机物，净化血液

消毒

完成句子

1. She then organized more than 200 neighbors, ________________(她们都是妇女) from nearby

villages, to do the same.  (them)

2. Thank you for your hard work last week. I don't think we ________________(能完成这项工作)

without you. (manage)

3. She is always doing everything for her son, which is ________________(她错误所在). (go)

4. ________________(尽管困难), the firefighters managed to rescue the little boy from the big fire. (as)

5. It' s the cheerfulness and lack of hesitation ______________(让孩子们铭记)that parents mean

what they say. (impress)

6. Not until the game had begun ________________(他才到达)at the sports ground. (arrive)

7. Since I won the big prize, my telephone hasn't stopped ringing. People ________________

(打电话)to ask how I am going to spend the money. (phone)

答案:have been phoning/are phoning

8. Have you ever expected ________________(有这么好的一次机会)for further education

abroad? (there)

9. The news ________________(房价将要下跌)has caused many people to sell their houses at

lower prices. (fall)

10. When reports came to the office ________________(轮船沉没了), they were not taken

seriously. (sink)