问题 解答题

如图为人体血液循环途径示意图

(1)血液循环分为______和肺循环.

(2)静脉血变为动脉血的场所是[______]______的毛细血管.

(3)与左心室相连的血管是[______]______.

(4)血液中的氧气进入组织细胞,组织细胞中的CO2进入血液这个过程是通过______实现的.

答案

(1)人体的血液循环的途径分为体循环和肺循环.

(2)血液流经肺部的毛细血管时肺泡中的氧扩散进入血液,血液中的二氧化碳扩散进入肺泡,使血液由静脉血变成了动脉血.

(3)在心脏的四个腔中左心室与主动脉相连,左心室与肺动脉相连,左心房与肺静脉相连,右心房与上下腔静脉相连.

(4)血液流经组织的毛细血管时组织细胞中的二氧化碳扩散进入血液,血液中的氧扩散进入组织细胞,使血液由动脉血变成了静脉血.故血液中的氧气进入组织细胞,组织细胞中的CO2进入血液这个过程是通过气体的扩散作用实现的.

故答案为:(1)体循环;(2)8肺泡周围 (3)3主动脉(4)气体的扩散作用

选择题
阅读理解

阅读下面的短文,并根据短文后的要求答题。(请注意问题后的字数要求)

    [1]Perhaps you are an average student with average intelligence.However,you can receive better grades if you want.Yes,even students with average intelligence can be top students without additional work.Here’s

how:

    [2]Plan your time carefully.Make a list of your weekly tasks.Then make a schedule of your time.Be sure to set aside enough time to complete your normal reading and work assignments.Of course,studying

shouldn’t occupy all of the free time on the schedule.

    [3]Make good use of your time in class.Listening to what the teacher says in class means less work

later. Take notes to help you remember what the teacher says.

   [4]Skim before you read.Look over a passage quickly before you begin to read it more carefully.As you preview the material,you get some idea of the content and how it is organized.Later when you begin to

read you will recognize less important material and you may skip some of these portions.Skimming helps

double your reading speed and improve you comprehension as well.

   [5]_____,Go over your notes as soon as you can after class.Review important points mentioned in class as well as points you remain confused.If you know what the teacher will discuss the next day,skim and

read that material,too.If you review your notes and textbook regularly,the material will become more meaningful and you will remember it longer.Regular review leads to improved performance on tests.

   [6]Develop a good attitude towards tests.The purpose of a test is to show what you have learned about a subject.The word won’t end if you don’t pass a test,so don’t worry excessively about a single test.

   [7]There are other techniques that might help you with your studying.Improving your studying habits will

improve your grades.

1.What’s the main idea of the passage?(no more than 8 words)

____________________________________________________________________

2.What should you do if you fail a test?(no more than 4 words)

____________________________________________________________________

3.Please fill in the blank in the fifth paragraph with proper words.(no more than 4 words)

____________________________________________________________________

4.According to the passage,how can an average student improve his/her grades?(no more than 6 words)

____________________________________________________________________

5.What does the word “it”(line 4,paragraph 5)probably refer to?(no more than 3 words)

____________________________________________________________________