内容正文:
选择性必修 第一册
大自然中有些现象令人无法解释, 它们到底是人为的, 还是外星人所为? 麦田地里的
圆圈到底是怎么形成的? 人们能否揭开这个让人困惑的谜?
Early in the morning of June 29th, 1991, Carrie and Morgenstern were watching the field.
Although they could see nothing through the thick fog, they kept their camera running. By 6 a.m.
the fog began to lift. A remarkable pair of circles was seen in the wheat field flattened
(变
平 )
. Stalks
(秆 )
were bent but not broken. Outside the circles the wheat was untouched.
Muddy
(多泥的 )
though the field was, there were no footprints or other marks. The circles
seemed to have come from nowhere.
“
I can蒺t explain it at all,
”
Carrie said to himself with his
eyes wide open.
Carrie is not alone. Since the early 1980s, more than 2,000 circles have appeared in
farmers蒺 fields. Most circles form at night between May and August.
Some believe the circles are caused by deer or some other animals. Others think of UFOs.
“
The circles are messages given by those who come from outer space,
”
says Michael Green,
“
perhaps they are trying to get in touch with us.
”
Pat Delgado has researched on crop circles since 1981. He believes that they are caused by
“
some form of earth energy
”
.
Most scientists think that there蒺s no scientific basis to support Green蒺s or Delgado蒺s theories.
Some of them say,
“
We think they蒺re nothing but a trick.
”
In September, Doug Bower and Dave Chorley told newsmen that since 1979 they had made
circles throughout southern England to fool people who believed in UFOs.
Since the early 1980s, Dr. Terence Meaden has visited more than 1,000 circles. Now he
thinks he may have the answer. He believes true circles are made by vortex
(旋风)
which can
flatten the crop in circular patterns
(式样)
.
Now crop circles are still found in southern England each summer. Are they really the
traces of UFOs?
( )
1. When the fog began to lift, Carrie was .