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（共12分）钛是21世纪金属。下面是利用钛白粉（TiO 2 ）生产海绵钛（Ti）的一种工艺流程： 已知：① Mg(s)＋Cl 2 (g)＝MgCl 2 (s)     △H＝－641 kJ·mol － 1 ② Cl 2 (g)＋1/2Ti (s)＝1/2TiCl 4 (l)  △H＝－385 kJ·mol － 1 （1）钛白粉是利用TiO 2 ＋ 发生水解生成钛酸（H 2 TiO 3 ）沉淀，再煅烧沉淀制得的。 TiO 2 ＋ 发生水解的离子方程式为 。 （2）反应I在800～900℃下进行，还生成一种可燃性无色气体，该反应的化学方程式为 ； 反应II的热化学方程式为 。 （3）该工艺流程中，可以循环使用的物质有 （填化学式）。 （4）在800℃～1000℃时电解TiO 2 也可制得海绵钛，装置如右图所示。图中b是电源的 极，阴极的电极反应式为 。
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pleasing
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annoying
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annoyed
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to be annoying
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being annoyed
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【单选题】Jess heard that somebody told Phoebe _____.
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to drop down dead
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to go hang herself
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【单选题】. It was in this house ________ he heard some strange sounds.
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that
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where
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which
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【简答题】Jess heard that somebody told Phoebe _____.A. todrop down dead B. togo hang herself
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【单选题】Jess went to a _______ for some shoes.
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shoes’ store
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shoe store
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shoe’s store
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shoes store
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【简答题】句型转换。 1. Jess has three pairs of pants. (对画线部分提问) ___ ___ pairs of pants ___ Jess ___? 2. I want this shirt.(改为复数句) ___ want ___ ___. 3. 我需要更多的帮助. I ___ ___ help. 4. 你有多少条裤子? ___ ___ ___ of trousers _...
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【单选题】We have heard of many cases _______  some citizens ，especially some famous people， have suffered because personal information had been leaked.
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why
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【单选题】What would happen if Cindy told Jess the truth?
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Jess would go on the camping trip himself．
B.
Jess'sfamily would be angry with Cindy．
C.
Cindy might have trouble with her friends.
D.
Jess would be thankful to his classmates．
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【简答题】He heard some children (laugh) ______ when he passed the door.
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相关题目：
【单选题】I heard some very ___news this morning.
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B.
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【单选题】Based on what I heard, some people got really _____ by our music, and some people liked it a lot.
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B.
Jess'sfamily would be angry with Cindy．
C.
Cindy might have trouble with her friends.
D.
Jess would be thankful to his classmates．
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【简答题】He heard some children (laugh) ______ when he passed the door.
查看完整题目与答案