问题 选择题

下列反应的离子方程式正确的是(  )

A.次氯酸钙溶液中通入过量二氧化碳

Ca2++2ClO-+H2O+CO2CaCO3↓+2HClO

B.硫酸亚铁溶液中加过氧化氢溶液

Fe2++2H2O2+4H+Fe3++4H2O

C.用氨水吸收少量二氧化硫

NH3·H2O+SO2NH+HSO

D.硝酸铁溶液中加过量氨水Fe3++3NH3·H2OFe(OH)3↓+3NH

答案

D

A中通入过量的CO2产生Ca(HCO3)2,B中电荷没有守恒,C中少量的SO2生成SO

阅读理解

Learning to play a musical instrument can change your brain, with a US review finding musical training can lead to improved speech and foreign language skills.

Although it was suggested in the past that listening to Mozart’s music or other classical music could make you smarter, there has been little evidence to show that music can boost(使增长) brain power.

But a data-driven review by Northwestern University has pulled reaserch together that links musical training to learning that spills over into (波及) skills including language, speech, memory, attention and even vocal emotion.

Researcher Nina Kraus said the data strongly suggested that the nervous connections made during musical training also prepared the brain for other aspects of human communication.

“ The effect of musical training suggests that, like physical exercise and its effect on body fitness, music is a resource that tones the brain for auditory fitness and thus requires society to re-examine the role of music in shaping individual development, ” the researchers said in their study.

Kraus said learning musical sounds could improve the brain’s ability to adapt and change and also enable the nervous system to provide constructing patterns that are important to learning.

The study, published in Nature Review Neuroscience , looked at the explosion of research in recent years focusing on the effect of musical training on the nervous system which could have impacts for education.

The study found that playing an instrument prepares the brain to choose what is related in a complex process that may involve reading or remembering a score, timing issues and coordination with other musicians.

小题1:What is the text mainly about ?

A.The effect of physical exercise.

B.The researcher named Kraus.

C.The benefit of musical training.

D.Musicians’ improved skills.小题2:The underlined word “ auditory ” in Paragraph 5 probably means “ __________”.

A.of the body

B.connected with seeing

C.of the mind

D.connected with hearing小题3:It was believed but not proved that listening to classical music could __________.

A.add to your intelligence

B.improve your speech

C.boost your memory

D.make you think faster小题4:According to Kraus, musical training contributes to the following EXCEPT __________.

A.body fitness

B.the way to speak

C.langugage learning

D.mental concentration

单项选择题