下列电离方程式，不正确的是 A．KOH==K++OH- B．CH3COOH==C

发布时间：2017-04-07 04:26 │ 来源：www.tikuol.com

题型：选择题

问题：

下列电离方程式，不正确的是

A．KOH==K⁺+OH^-

B．CH₃COOH==CH₃COO^- + H⁺

C．NH₃·H₂ONH₄⁺+OH^-

D．Na₂CO₃ ="=" 2Na⁺+CO₃^2-

考点：物质的简单分类

题型：选择题

完形填空。

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Queen. They stood around her and said "  14  " to her. She even won the School Best Actress Award
for her wonderful performance.
     Now Lisa doesn't worry  15   being fat any more. She believes in the English saying "Every dog has
its day."

( )1. A. see
( )2. A. easy
( )3. A. making
( )4. A. who
( )5. A. her
( )6. A. can
( )7. A. having dinner
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( )10. A. was
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( )12. A. agreed
( )13. A. very
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( )15. A. with

B. watch
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C. notice
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D. look
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D. Good-bye
D. for

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题型：选择题

化学方程式可简明地体现元素及其化合物的性质。已知：

氧化还原反应：2FeCl₃ + 2HI = 2FeCl₂ + I₂+ 2HCl；

2Co(OH)₃ + 6HCl = 2CoCl₂ + Cl₂↑ + 6H₂O

2FeCl₂ + Cl₂ = 2FeCl₃

复分解反应： 2CH₃COOH + K₂CO₃ = 2CH₃COOK+ CO₂ ↑ + H₂O；

KCN + CO₂ + H₂O =" HCN" + KHCO₃

热分解反应： 4NaClO3NaCl + NaClO₄；NaClO₄NaCl + 2O₂↑

下列说法不正确是

A．还原性（酸性溶液）：Fe²⁺> I^- > Cl^-

B．氧化性（酸性溶液）：Co(OH)₃ >Fe³⁺ > I₂

C．酸性(水溶液):CH₃COOH >H₂CO₃ >HCN

D．热稳定性:NaCl>NaClO₄>NaClO

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某服装原价为200元，连续两次涨价a%后，售价为242元，则a的值为______．

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下列选项中，哪一项是社会工作者对专业的伦理责任（）。

A.加强专业评估与研究

B.能力

C.保密性

D.教育与培训

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除了制度保证体系外，施工安全保证体系还包括（）。

A.组织保证体系

B.技术保证体系

C.投入保证体系

D.管理保证体系

E.信息保证体系

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