Tornados occur when the conditions
that cause thunderstorms are unusually violent. Winds blow in
opposite directions around a strong updraft start a narrow, violent
whirl. Centrifugal force effectively throws the air away from the
center, leaving a core of very low pressure. This is much like
stirring water in a cup, thus forming a vortex-like dip in the
surface.
This low-pressure core acts as a
partial vacuum, sometimes helping to lift the roofs off houses. Most
of the damage, though, result from the force of the wind itself.
Around the edges of the whirls, wind prefer may reach 300 miles(480
kilometers) per hour. At first, the tornado's funnel is whitish gray
because it is composed of minute water droplets formed as the air in
the funnel expands and cools. After touching down, the funnel becomes
dark because of all the debris it has picked up. This debris can
include soil, tree limbs, and parts of buildings, tornados have been
known to pick up automobiles, hoeses, and whole trees.
A tornados usually moves toward the east (or often northeast in the northern hemisphere and southeast in the southern hemisphere) at 25 to 40 miles (40 to 65 killmoeters) per hour. Fortunately, most tornados are less than half a mile (800 meters) wide the edge of one may destroy all of the houses on one side of a street while leaving those on the other side completely undamaged.
Deaths from tornados in the united states averaged roughly 100 per year over the last century. However, they have dropped somewhat in recent decades as better forecasting and warning systems have been implemented.
A tornados usually moves toward the east (or often northeast in the northern hemisphere and southeast in the southern hemisphere) at 25 to 40 miles (40 to 65 killmoeters) per hour. Fortunately, most tornados are less than half a mile (800 meters) wide the edge of one may destroy all of the houses on one side of a street while leaving those on the other side completely undamaged.
Deaths from tornados in the united states averaged roughly 100 per year over the last century. However, they have dropped somewhat in recent decades as better forecasting and warning systems have been implemented.
- Why is tornado's funnel dark as soon as it touches the ground? Because....
A. It contains water droletsB. the temperature is changedC. it contains bulding materialsD. it whirls in high speedE. it has picked up debris - What are impact of tornado?A.Water droppingB. heavy disastersC. whirls of windsD. wind blowingE. gray and dark sky
- “While leaving those on the other side completelly undamaged “ (paragraf3)The underline word has similar meaning with...A. damagedB. vanishC. woundedD. safeE. gone
Internet has
been the mosat outstanding innovation in the history of mankind. As
with every single innovation, the internet has its own advantages and
disadvantages.
The
target of the internet has always been the communication. By the
beginning of computer's internet, our earth has reduced and has
attained the form of a global village. Now, we can communicate in a
fraction of second with a person who is sitting in the other parts of
the world. Today, for better communication, we can avail the
facilities of e-mail and we can chat for hours with our loved ones.
There are plenty messenger services in offering. With the help of
such services, it has become very easy to establish a king of global
friendship.
However, the internet also has disadvantages. One of them is the wife spread of unsuitable contents for kids. It is a very serious issue and related to children's healthy mental life. There are thousand of such inappropriate contents on the internet which can be easily found. Though, the internet can also create havoc, destration and its misuse can be very fatal, the advantagei of it out-weigh its disadvantages.
However, the internet also has disadvantages. One of them is the wife spread of unsuitable contents for kids. It is a very serious issue and related to children's healthy mental life. There are thousand of such inappropriate contents on the internet which can be easily found. Though, the internet can also create havoc, destration and its misuse can be very fatal, the advantagei of it out-weigh its disadvantages.
- What is one of the advantages of internet ?A. to create the misuse of timeB.to easily find inappropriate personC.to chat with love ones onlyD.to connect people in the other parts of the worldE.to spread issues related to children's healthy mental life
- What is the main idea of paragraph 2 ?A. the internet could create havoc and destructionB. the internet could facilitate communicationC. the internet has more advantages than disadvantagesD. many modern devices can be connect to the intrrnetE. the internet has bcome the most noticeable innivation.
- All in all, the writer believes that the internet is....A. very harmfulB. inappropriateC. very usefulD. destructiveE. cheap
Once upon a
time there lived a wise man named Mamad. He never lied. All the
people knew about him. The king heard about Mamad and ordered his
guards to bring him to the palace. He looked at the wise man and
asked, "Mamad, is it true that you have never lied?" Mamad
answered, "it's true." The king asked him another question,
"and you will never lie in your life?" Mamad replied, "i'll
do my best not to tell a lie." The king advised him, "OK.
Tell the truth, but be careful! To lie is cunning and it gets on you
tongue easily"
Several day passed and the king called Mamad again. There was a big crowd. The king was about to go hunting. The king held his horse by the mane, his left foot was already in the stirrup. He ordered Mamad, "go to my summer palace and tell the queen i will be with her for lunch. Tell her to prepare a big feast. You will have lunch with me". Mamad bowed and went to the queen. Then, the king laughed and said to the crowd, " we won't go hunting and now Mamad will lie to the queen. Tomorrow we will laugh on his behalf".
The wise Mamad went to the palace and said "maybe you should prepare a big feast for lunch tomorrow and maybe you shouldn't. Maybe the king will come by noon and maybe he won't" the queen asked, " tell of will he come, or won't he ?" "i don't know whether he put his right foot in the stirrup, or he put his left foot on the ground after i left, " Mamad replied wisely
Everybody waited for the king. He came the next day and said to the queen, " the wise Mamad, who never lies, lied to your yesterday" but the qween told him about the words of Mamad and the king realized that the wise man did not lie. He told the queen what he say with his own eyes.
Several day passed and the king called Mamad again. There was a big crowd. The king was about to go hunting. The king held his horse by the mane, his left foot was already in the stirrup. He ordered Mamad, "go to my summer palace and tell the queen i will be with her for lunch. Tell her to prepare a big feast. You will have lunch with me". Mamad bowed and went to the queen. Then, the king laughed and said to the crowd, " we won't go hunting and now Mamad will lie to the queen. Tomorrow we will laugh on his behalf".
The wise Mamad went to the palace and said "maybe you should prepare a big feast for lunch tomorrow and maybe you shouldn't. Maybe the king will come by noon and maybe he won't" the queen asked, " tell of will he come, or won't he ?" "i don't know whether he put his right foot in the stirrup, or he put his left foot on the ground after i left, " Mamad replied wisely
Everybody waited for the king. He came the next day and said to the queen, " the wise Mamad, who never lies, lied to your yesterday" but the qween told him about the words of Mamad and the king realized that the wise man did not lie. He told the queen what he say with his own eyes.
- The purpose of the text is....A. to entertain the readersB.to describe a wise personC.to tell a king's hunting experienceD.to inform the readers about wisdomE.to analyze the chreaters of a story
- What was the king like?A. wiseB. genereousC. stubbornD. foolishE. tricky
- After Mamad had left the king.....A. the king ordered the crowd to gatherB. the king rode the horse and went huntingC. the king met the qween and had lunch with herD. the king laughed and said he would not go huntingE.the king took the horse and put a foot in the stirrup
- What did Mamad tell the qween?A. he told a lieB. he told what he sewC. he told what he thought trueD he told that the king urdered himE. he told that the king won't come by noon