时间:2015-06-13 22:34:20
B. children should be left to decide what to read and how to read
C. reading is never a pleasant and inspiring experience in school
D. reading involves understanding every little piece of information
B
Graph can be a very useful tool for conveying information especially numbers， percentages,
and other data . A graph gives the reader a picture to interpret . That can be a lot more pages and pages and pages explaining the data .
Graphs can seem frightening, but reading a graph is a lot like reading a story . The graph has a title ,a main idea ,and supporting details .You can use your active reading skills to analyze and understand graphs just like any other text .
Most graphs have a few basic parts: a caption or introduction paragraph, a title , a legend or key, and labeled axes. An active reader looks at each part of the graph before trying to interpret the data. Captions will usually tell you where the data came from (for example, a scientific study of 400 African elephants from 1980 to 2005). Captions usually summarize the author's main point as well. The title is very important. It tells you the main idea of the graph by stating what kind of information is being shown. A legend, also called a key ,is a guide to the symbols and colors used in the graph. Many graphs, including bar graphs and line graphs, have two axes that form a corner, Usually these axes are the left side and the bottom of the graph .Each axis will always have a label. The label tells you what each axis measures.
Bar Graphs
A bar graph has two axes and uses bars to show
amounts. In Graph 1 ,we see that the x-axis shows grades
that students earned, and the y-axis shows bow many
students earned each grade .You can see that 6 students
earned an A because the bar for A stretches up to 6 on the
vertical measurement. There is a lot of information we can
get from a simple graph like this(See Graph 1).
Line Graphs
A line graph looks similar to a bar graph ,but instead of
Bars, it plots points and connects them with a line .It has the Same parts as a bar graph – two labeled axes –and can be read the same way .To read a line graph, it's important to focus on the points of intersection rather than the line
segments between the points, This type of graph is most
commonly used to show how something changes over time.
Here is a graph that charts how far a bird flies during the first Five days of its spring migration (See Graph 2).
The unit of measurement for the x-axis is days. The unit of measurement for the y-axis is kilometers. Thus we can see that ,on the first day, the pipit flew 20 kilometers. The line segment goes up between Day 1 and Day 2,which means that the bird flew farther on Day 2.If the line segment angled dawn, as between Day 4 and Day 5,it would mean that the bird flew fewer kilometers than the day before. This line graph is a quick, visual way to tell the reader about the bird's migration.
Pie Graphs
A typical pie graph looks like a circular pie. The circle is divided into sections, and each section represents a fraction of the data. The graph is commonly used to show percentages; the whole pie represents l00 percent, so each piece is a fraction of the whole.
A pie graph might include a legend，or it might use icons or labels within each slice. This pie graph shows on month's expense, (See Graph 3 ).
Food $ 25
Movies $ 12
Clothing $ 36
Savings $ 20
Books $ 7
46. When used in a graph，a legend is_____
A. a guide to the symbols and colors B. an introduction paragraph
C. the main idea D. the data
47. What is the total number of students who earned a C or better ?
A .4. B.6. C.10. D.20 .
48. The bird covered the longest distance on _____
A. Day 1 B. Day 2 C. Day 3 D. Day 4
49. Which of the following cost Amy most ?
A. Food. B. Books C. Movies D. Clothing.
C
If humans were truly at home under the light of the moon and stars，we would go in darkness happily，the midnight world as visible to us as it is to the vast number of nocturnal(夜间活动的) species on this planet. Instead，we are diurnal creatures, with eyes adapted to living in the sun's light. This is a basic evolutionary fact , even though most of us don't think of ourselves as diurnal beings. Yet it's the only way to explain what we've done to the night: We've engineered it to receive us by filling it with light.
The benefits of this kind of engineering come with consequences 一 called light pollution 一 whose effects scientists are only now beginning to study. Light pollution is l