某同学为测定一高锰酸钾样品的纯度进行了以下实验.取该高锰酸钾样品10g,放在试管

题型:问答题

问题:

某同学为测定一高锰酸钾样品的纯度进行了以下实验.取该高锰酸钾样品10g,放在试管中加热至完全反应,冷却后,称得剩余固体质量为9.04g.请计算:

(1)反应中产生的氧气的质量;

(2)高锰酸钾样品的纯度.

考点:化学反应方程式的计算
题型:问答题

阅读理解。

   Mr. Wilson gave his wife ten pounds for her birthday. The day after her birthday,Mrs. Wilson went

shopping. She got on a bus and sat down next to an old lady. After a while,Mrs. Wilson noticed that the old lady's bag was open.  She saw a ten-pound not inside the handbag which was just like the one her

husband had given her. So she quickly looked into her own bag:the ten-pound note had gone!

Mrs. Wilson was sure that the old lady had stolen it. She thought for a while and she was sure that she

should call the police. But as she disliked getting people into trouble, she decided to take back the money

from the old lady's handbag and say nothing more about it. She looked around to make sure that nobody was watching, then she carefully put her hand into the old lady's hand bag, took the note and put it carefully into her own bag.When Mrs. Wilson got home that evening,she showed her husband the beautiful skirt

she had bought. “How did you pay for it?”he said.“With the money for my birthday, of course.” she

replied.“Oh?What's that then?”he asked as he pointed to a piece of ten-pound note on the table.

A.根据短文内容, 用合适的单词填空。

One year, Mr. Wilson gave his wife Mrs. Wilson a 10-pound     1    for her birthday. Mrs. Wilson left it at home, but she wasn't aware of that. When she got on the bus, she    2       that an old lady's bag was open. She saw a ten-pound note inside and she thought that it was ___3_____ So she took it and bought a

beautiful     4     with it. But when she got home in the evening, she knew that she was   5      to think about the old lady stealing her money.

1.____________   2.____________   3.____________4.____________   5.____________

B.根据短文内容. 选择最佳答案。

6. What did Mrs. Wilson see inside the old woman's bag?

A. A ten-pound note.     

B. A note.     

C. Twenty pounds.    

D. A dress.

7. What did Mrs. Wilson do when she was sure that the old lady had stolen her money?

A. She called the police?    

B. She shouted for help, \   

C. She took back the money herself.    

D. She argued with the old lady.

8 . The word “replied” can be replaced by “___________”.

A. asked      

B. answered      

C. said      

D. talked

题型:问答题

帕金森病患者跌倒的最常见原因为()

A.体位性低血压

B.不宁腿综合征

C.姿势反射障碍

D.神经精神障碍

E.异动症

题型:问答题

关于新生儿病理性黄疸,哪项说法不正确

A.生后2~3天出现,4~6天最重

B.血清总胆红素浓度>205μmol/L

C.血清胆红素上升速度>85/μmol/L

D.血清结合胆红素浓度>2μmol/L

E.黄疸退而复现

题型:问答题

以财产作抵押,不须登记即可以生效的是( )。

A.民用航空器

B.林木

C.船舶

D.金银珠宝

题型:问答题

进行配载时,需要考虑的因素是()。

A.商品的品种

B.商品的数量、重量

C.运输时间

D.运输路线

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