4.[1]Sitting in class one afternoon,you feel your nose begin to run.As you wonder if you're catching a cold,you are shocked to see blood on the tissue(紙巾)you're using!You have a nosebleed.
[2]Don't worry.Nosebleeds are always easy to stop.Get some tissues or a damp cloth to catch the blood.Sit or stand so that your head is above your heart.Move your head forward and squeeze the soft part of your nose together just below the bony (骨頭突出的) center.Applying pressure helps stop the flow of blood,and the nosebleed will usually stop after 10minutes of steady pressure don't keep checking to see if the bleeding has stopped.
[3]If you've tried the steps described above twice and the bleeding continues,you'll need to see a doctor.Once you've stopped bleeding,don't lift heavy objects or do sports that make you tired,and try not to blow your nose for 24hours.
[4]With your nosebleed over,let's learn more about nosebleeds.The most common kind is an anterior(前部的) nosebleed,whose most common cause is dry air.It also occurs after repeated blowing when you have a cold.
[5]Another kind is a posterior (后部的) nosebleed,which comes from the deepest part of the nose.Blood from a posterior nosebleed flows down the back of the throat even if you are sitting or standing.Teens seldom have posterior nosebleeds,which occur most often in older people,people with high blood pressure,or who have had nose or face injuries.
[6]Nosebleeds usually are not severe,but frequent nosebleeds might suggest a serious problem.If you get nosebleeds frequently--more than once a week you should see a doctor.
46.What is the main idea of Paragraph 2?
How to stop nosebleeds. (within 6words)
47.What are the three things that you had better not do within 24hours of a nosebleed?
①lift heavy objects②do sports③blow your nose(within 10words)
48.What is the most common cause of the most common kind of nosebleeds?
Dry air.  (within 4words)
49.Which kind of nosebleed occurs mainly among older people?
Posterior nosebleeds (within3words)
50.How often do you catch nosebleeds so you should see a doctor?
More than once a week.  (within 5words)

分析 短文主要介紹了當流鼻血的時候,應(yīng)該怎么做能制止這種現(xiàn)象,同時介紹了在流鼻血后應(yīng)注意什么事項,最后介紹了流鼻血分為前部的和后部的,如果是經(jīng)常發(fā)生這種現(xiàn)象的話,就應(yīng)該及時看醫(yī)生.

解答 46.How to stop nosebleeds.主旨大意題,第二段主要講了當你流鼻血的時候,應(yīng)用紙巾或者濕布擦掉血,并保持站著或坐著的姿勢,并且捏住鼻子上柔軟的部分大概十分鐘就能制止住流鼻血,因此主要講了如何抑制流鼻血.
47.lift heavy objects,do sports,blow your nose.細節(jié)理解題,根據(jù)第三段don't lift heavy objects or do sports that make you tired,and try not to blow your nose for 24hours,可知流鼻血后24小時內(nèi)不要做的事情就是lift heavy objects,do sports,blow your nose.
48.Dry air.細節(jié)理解題,根據(jù)第四段The most common kind is an anterior(前部的) nosebleed,whose most common cause is dry air.可知答案為Dry air.
49.Posterior nosebleeds.細節(jié)理解題,根據(jù)第五段Teens seldom have posterior nosebleeds,which occur most often in older people可知"老年人一般是后部的流鼻血".
50.More than once a week.細節(jié)理解題,根據(jù)最后一段If you get nosebleeds frequently--more than once a week you should see a doctor 可知答案.

點評 題目涉及多道細節(jié)理解題,做題時結(jié)合原文和題目有針對性地找出相關(guān)語句進行分析,結(jié)合選項找出正確答案,主旨大意題是要抓住關(guān)鍵語句對文章進行理解,才能得出正確答案,切忌胡亂猜測,一定要做到有理有據(jù).

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