A natural disaster is a terrible accident, e.g. a great flood , a big fire, or an earthquake. It usually causes great suffering and loss of a large sum of money. The causalities are injured or died. Some people are homeless and need medical care.
Floods occur when the water of rivers, lakes, or stream overflow their banks and pour out into the surrounding land. Floods are caused by many different things. Often heavy rainstorms that last for a brief time can cause a flood. But not all heavy storms are followed by flooding. If the surrounding land is fl at and can absorb the water, no flooding will occur. If, however, the land is hard and rocky, heavy rain cannot be absorbed. Where the banks are low, a river may overflow and flood adjacent lowland.
In many parts of the world floods are caused by tropical storms called hurricanes or typhoons. They bring destructive winds of high speed, torrents of rain, and flooding. When a flood occurs, the destruction to the surrounding land can be severe. Whole villages and towns are sometimes swept away by water pouring swiftly over the land. Railroad tracks and buckles are uprooted from their beds. Highways are washed away.
When a building caught fire, the firemen pitched in to help battle the blaze. Before the pumps were invented, people formed bucket brigades to fight fires. Standing side by side, they formed a human chain from the fire to nearby well or river. They passed buckets of water from hand to hand to be poured on the flames.
The damage of fire did depend a great deal on where it happened. In the country or a small village, only a single house might burn down. But in crowded cities, fire often destroyed whole blocks and neighborhoods before being controlled.
1. What can possibly prevent rivers and lakes from overflowing?
A. An absorbent bed
B. A rocky surrounding
C. A low land
D. A high bank
E. A high road
The colleges provide their students with the lodgings and meals, assigns tutors, and offer social, cultural, and athletic activities. Every student at the University of Cambridge is a member of a college. Let's see its academic year.
The academic year is divided into three terms of approximately eight weeks each: Michaelmas (autumn) , Lent (late winter), and Easter (spring). Students required to study under supervisor are usually members of the college's faculties who maintain close relationships with small groups of students in their charge and assist them in preparing for university exams.
2. The author's purpose of writing the text is ....
A. to review particular education systemB. to commemorate a particular college
C. to define a particular academic year
D. to explain a particular way to study
E. to describe a particular institution
The first digestive process takes place in the mouth. The food we eat is broken up into small pieces by the action of teeth, mixed with saliva, a juice secreted by glands in the mouth. Saliva contains digestive juice which moisten the food, so it can be swallowed easily.
From the mouth, food passes through the esophagus (the food passage) into the stomach. Here, the food is mixed with the juices secreted by the cells in the stomach for several hours. Then the food enters the small intestine. All the time the muscular walls of the intestine are squeezing, mixing and moving the food onwards.
In a few hours, the food changes into acids. These are soon absorbed by the villi (microscopic branch projections from the intestine walls) and passed into the bloodstream.
A. produced
B. managed
C. arranged
D. completed
E. constructed
A. The food changes into acids absorbed by the villi.
B. The food must be digested first through the process.
C. The food is directly swallowed through esophagus into the stomach.
D. The food is mixed with the juices secreted by the cells in the stomach.
E. The food we take must be changed into substances carried in the blood to the places.
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