搜题请搜索小程序“爱下问搜题”
问题 单项选择题 B型题

高位肠梗阻最常见的酸碱失衡是（）

A.代谢性酸中毒

B.代谢性碱中毒合并呼吸性酸中毒

C.代谢性碱中毒

D.呼吸性碱中毒失代偿

E.混合型酸中毒

答案

参考答案：C

解析：1.高位肠梗阻呕吐出大量胃液，丢失氢离子，病人出现代谢性碱中毒。 2.低位肠梗阻大量肠液积存在肠道，病人丢失大量碱性液体，出现代谢性酸中毒。

阅读理解

When we talk about stars, especially women stars，it seems that they are always young，pretty and own charming body shapes．But recently a Britain's Got Talent（英国达人）star Susan Boyle has changed our views absolutely．

Simon Cowell，one of the judges of the talent show spoke of his shock over Ms Boyle's voice．”This lady came up，and I'm thinking, ‘This will take five seconds and I can go to have a cup of tea.’ That changed when she began to sing I Dreamed a Dream from Les Miserables. She knew we were going to have that reaction and just to see that look of satisfaction on her face midway through —it was one of my favorite moments,” Cowell said.

The performance was posted online and before long，the 47-year-old Scottish woman has been famous all over the world．

Speaking from her home in Scotland．Ms. Boyle said that she hadn't thought of changing her appearance．She said that her friend helped her with make-up．“I mean，that's hardly a makeover．”she added．

Ms. Boyle also spoke of the reason she first began to explore her vocal talents．”I was kind of slow at school, so getting something like singing was a good way of hiding behind that and thus it built my confidence．’

小题1:Susan Boyle is __________．

A．a judge

B．a reporter

C．a beautiful lady

D．a Scottish woman小题2:Susan Boyle had a look of satisfaction on her face when she was singing because _________.

A．she was confident of her singing

B．she was satisfied with the judges

C．she was pretty and in good shape

D．she sang the song，I Dreamed a Dream from Lea Miserables小题3:According to the passage，which is NOT true?

A．It was the vocal talents that built Susan's confidence．

B．Susan Boyle was not good at her lessons when at school．

C．Susan Boyle became famous because of her appearance．

D．Simon Cowell didn't think Susan Boyle a good singer at the time sight．小题4:What can we learn from Susan Boyle's success?

A．It's never too old to learn．

B．It's easier to succeed at the age of 47．

C．If you have a dream，try to make it come true!

D．If you are not able to study well，to be a singer instead．
查看答案
实验题

某班化学实验课进行酸碱盐的性质实验。

【自制酸碱指示剂】

（1）取少量紫包菜和白菜叶剪碎后分别放在研钵中捣烂，加入酒精浸泡；用纱布将浸泡出的汁液挤出，分别装好待用。

（2）取四支试管分别用NaOH溶液和稀盐酸进行实验，观察到现象如图，记录如下：

 NaOH溶液稀盐酸苹果汁
紫包菜汁液①绿色②红色红色
白菜汁液③无色④淡黄色淡黄色
 

你认为两种汁液中，更适合做酸碱指示剂的是　                             　。

（3）再用苹果汁进行相同实验，现象记录见上表．则苹果汁溶液显　      　性。

【酸碱盐的性质】

第一组学生进行CuSO4与NaOH溶液的反应，观察到的现象是　                 　；

第二组学生进行BaCl2与Na2CO3溶液的反应，反应的方程式为　                        　。

从复分解反应发生的微观本质上看，中和反应的实质可以用下图1表示，那么请在图2虚框中将CuSO4与NaOH溶液的反应的微观示意图补充完整。

【废液再探究】

实验结束后，两组同学将全部的浊液集中倒进一个废液缸中．化学兴趣小组对浊液进行过滤，得到无色滤液，进一步探究无色滤液的成分。

【提出问题】滤液里溶质除了NaCl外，还有什么物质？

【提出猜想】猜想①：BaCl2；猜想②：Na2SO4；猜想③：NaOH；猜想④：BaCl2、NaOH；猜想：⑤Na2CO3、Na2SO4；猜想：⑥Na2SO4、NaOH；猜想：⑦Na2CO3、Na2SO4和　     　。

【实验探究】

（1）取样，滴加紫包菜叶汁，显绿色，小军判断一定含NaOH，小华不同意，理由是　         　。（2）取样，加入足量的稀硫酸，无明显现象，则猜想　             　一定不成立。

（3）为确定该滤液的组成，还需补充的实验是：　                             　，若观察到白色沉淀，则该无色滤液的组成有　                                               　。
查看答案