请用“>”、“<”、“=”或“无法比较”填空. (1)pH______7的溶液能

题型:填空题

问题:

请用“>”、“<”、“=”或“无法比较”填空.

(1)pH______ 7的溶液能使紫色石蕊试液变红.石灰水的pH______7.

(2)相对分子质量______ 29的气体可用向上排空气法收集.

(3)5.6g含铜的铁粉与足量的稀硫酸反应,生成的氢气质量______0.2g.

(4)一个NH4+离子和一个CH4分子相比,所含质子数前者______后者,所含电子数前者______后者.

(5)Xg Cu经过下列一系列变化Cu→CuO→CuSO4→Cu(OH)2→CuCl2→Cu

(设各步反应中各物质均无损耗),最后生成的Cu的质量______Xg;

(6)在室温时,某同学配制100g溶质质量分数为11.5%的KNO3溶液,计算后,他在天平左盘放入10g砝码,游码定位于1.5g处,他在右盘中放入KNO3晶体,称量完毕后,他将100mL量筒平放在桌上,视线与量筒内凹液面的最低处保持水平,量取了88.5mL水,用以配制溶液.

请问该同学这样配出的溶液的溶质质量分数______11.5%.

考点:酸碱指示剂实验室制取和收集气体的思路溶液的配制化学反应方程式的计算溶液的酸碱性与pH值
题型:填空题
完形填空。
     When Anna first  1  Beijing, she couldn't speak any Chinese, and she knew very  2  about China. She
couldn't use chopsticks, so for the first two or three weeks, she  3  take a fork and a spoon with her when
she went to eat in a restaurant. But now, with the help of her friends, she can use chopsticks very well.
     Food was a big problem, too. It  4  her a few weeks to get used to Chinese food. She didn't really like
it at first. She  5  it was too oily (油腻的). Also, she doesn't eat much rice. She usually eats bread, and her bread is quite  6  from most bread in China. Chinese bread is usually light and sweet. She can't eat bread
like  7 , so in Beijing she makes her own bread at home. Well, she is a Muslim (伊斯兰教信徒). She isn't  8  to eat pork.
     But that isn't really a problem. After she'd been in Beijing for about a month, she found out that there
were Muslims here, too--and lots of Muslim  9 ! Most of them serve Xinjiang food, which is very similar
to the food she eats.  10  now her food problems are solved.
( )1. A. arrived at
( )2. A. a few     
( )3. A. used to   
( )4. A. spent     
( )5. A. is thinking
( )6. A. different 
( )7. A. it        
( )8. A. allow     
( )9. A. banks     
( )10. A. So       
B. arrived in
B. much      
B. use to    
B. costs     
B. think     
B. same      
B. them      
B. allowed   
B. factories 
B. Because   
C. get to    
C. little       
C. was used to
C. paid      
C. thought   
C. difference
C. those     
C. allowing  
C. restaurants
C. Or        
D. got at      
D. many        
D. was used for
D. took        
D. thinked     
D. the same     
D. that        
D. to allow    
D. libraries   
D. But         
题型:填空题

耳郭软骨膜炎、急性中耳炎、鼻窦炎、咽炎、扁桃体炎、喉炎均可采用的物理治疗有

A.超短波疗法

B.紫外线疗法

C.直流电离子导入

D.调制中频电

E.感应电疗法

题型:填空题

目前,我国增值税的基本税率为( )。

A.6%

B.13%

C.15%

D.17%

题型:填空题

风轮赤豆相当于现代医学之:()

A.泡性结膜炎

B.前部巩膜炎

C.树枝状角膜炎

D.浅层点状角膜炎

E.束状角膜炎

题型:填空题

S8016在以太网接口下配置tag-tosenable命令的作用是:()

A.使能接口对802.1Q优先级的支持。

B.使能接口对802.1P优先级的支持。

C.在802.1Q中表示是否支持TAG的优先级功能。

D.在802.1P中表示是否支持VLANTAG的最后3bit表示的优先级。

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