问题 填空题

鳃由______、______、______三个部分构成.主要部分是______,它里面密布______.

答案

鳃是鱼的呼吸器官,由鳃丝、鳃耙和鳃弓组成的,其主要部分是鳃丝,里面含有大量的毛细血管,当水流经鳃丝时,水中的溶解氧进入鳃丝的血管中,而二氧化碳由鳃丝排放到水中,二者进行气体交换. 

故答案为:鳃丝;鳃耙;鳃弓;鳃丝;毛细血管

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My Classroom Wheel Teachers 2012~2013
Welcome to My Art Class!

My Classroom Mission(任务)
We will learn about art history, artists and develop students’ talent. In order to learn, be creative and improve our painting skills, we will have a relaxing classroom.
Name: Kathy Grady   
Email Address: kgrady@iss.k12.nc.us
Welcome to Pope’s Computer Lab!

My Classroom Mission
Students will work together and actively take part in designing the computer programs. By doing this we will be able to use computer technology successfully in our lives.
Name: Barbara Pope
Email Address: bpope@iss.k12.nc.us
Welcome toMyPE class!

My Classroom Mission
Be active in PE classes! You do not have to be an Olympic athlete to get an A in my class. Take part in our sports activities to keep a healthy body and mind. All students will be successful. 
Name: Sherry Cash
Email Address: scash@iss.k12.nc.us
Welcome to the Science Lab!

My Classroom Mission
This year we will learn about science by becoming a scientist. We will do experiments, observe, touch, listen, and ask questions about our world. We will learn to care for our world. We will never give up trying!
Name: Denise Harris
Email Address: dharris@iss.k12.nc.us
小题1:In order to improve___________, the students will have a relaxing classroom.
A.painting skillsB.computer programsC.sports activitiesD.science studies
小题2:We can email at ________ to get more information about computer class.
A.dharris@iss.k12.nc.usB.kgrady@iss.k12.nc.us
C.bpope@iss.k12.nc.usD.scash@iss.k12.nc.us
小题3:Students should go to __________ class to learn to do experiment.
A.Barbara Pope’sB.Sherry Cash’sC.Kathy Grady’sD.Denise Harris’
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