题目内容
As they migrate（迁移），butterflies and moths choose the winds they want to fly with，and they change their body positions if they start floating in the wrong direction．This new finding suggests that insects may employ some of the same methods that birds use for traveling long distances．Scientists have long thought that insects were simply at the mercy of the wind．
Fascinating as their skills of flight are，migrating behavior has been difficult to study in insects because many long distant trips happen thousands of feet above ground．Only recently have scientists developed technologies that can detect such little creatures at such great heights．
To their surprise，though，the insects weren’t passive travelers on the winds．In autumn，for example，most light winds blew from the east，but the insects somehow sought out ones that carried them south and they positioned themselves to navigate directly to their wintering homes．
Even in the spring，when most winds flowed northward，the insects didn’t always go with the flow．If breezes weren’t blowing in the exact direction they wanted to go，the insects changed their body positions to compensate．Many migrating birds do the same thing．
The study also found，butterflies and moths actively flew within the air streams that pushed them along．By adding flight speeds to wind speeds，the scientists calculated that butterflies and moths can travel as fast as 100 kilometers an hour．The findings may have real-world applications． With climate warming，migrating insects are growing in number．Knowing how and when these pests move could help when farmers decide when to spray their crops．
1．What’s the main idea of the text?
A．Insects migrate with the seasons．
B．Wind helps insects greatly in migrating．
C．Windsurfing insects have real direction．
D．Scientists have trouble in observing insects．
2．Scientists originally thought that ．
A．insects always waited for their favourable winds
B．insects chose the winds they wanted to ride
C．insects were just blown about by the wind
D．insects positioned themselves in the winds
3．It is not easy to study the migrating behavior of the insects because .
A．the little creatures can fly very fast B．they have no regular migrating courses
C．the wind’s direction is hard to foresee D．their flight is long and high above ground
4．We can learn from the text that .
A．insects fly in the way birds do
B．insects travel more easily in autumn
C．insects never position themselves when flying low
D．insects rest a lot when the wind pushes them along
5．According to the passage，the findings can ．
A．increase insects in number B．instruct farmers when to spray
C．prevent climate warming D．help protect insects
CCDAB
一线名师口算应用题天天练一本全系列答案
小学学习好帮手系列答案Any foreigner who has tried to learn Chinese can tell how hard it is to master the tones required to speak and understand. And anyone who has tried to learn to play the violin or other instruments can report similar challenges.
Now researchers have found that people with musical training have an easier time learning Chinese. Writing in the online edition of Nature Neuroscience，researchers from Northwestern University say that both skills draw on the same parts of the brain that help people discover changes in pitch(音调)．
One of the study’s authors，Nina Kraus，said the findings suggested that studying music “actually tunes our sensory system”．This means that schools that want children to do well in languages should hesitate before cutting music programs，Dr.Kraus said. She said music training might also help children with language problems.
Mandarin(普通话)speakers have been shown to have a more complex encoding(编码) of pitch patterns in their brains than English speakers do. This is because in Mandarin and other Asian languages，pitch plays a central role. A singlesyllable word can have several meanings depending on how it is intoned.
For this study，the res
earchers looked at 20 nonChinese speaking volunteers，half with no musical background and half who have studied an instrument for at least six years.
As they were shown a movie，the volunteers also heard an audio tape of the Mandarin word “mi” in three of its meanings：squint，bewilder and rice. The rese
archers recorded activities in their brain stems to see how well they were processing the sounds. Those with a music background showed much more brain activities in response to the Chinese sounds.
The lead author of the study，Patrick C．M.W
ong，said it might work both ways. It appears that
native speakers of tonal languages may do better at learning instruments.
【小题1】When learning Chinese，a foreigner will find ________.
| A．he has a difficult time learning music at the same time |
| B．he has an easier time learning music at the same time |
| C．it is hard to master the tones required to speak and understand |
| D．it is easy to use the brain to help him discover changes in pitch |
| A．Because there is the same difficulty in learning Chinese and music. |
| B．Because skills to learn the two make use of the same parts of the brain. |
| C．Because music training might help people with language study. |
| D．Because people who do well in Chinese study do well in music. |
| A．created | B．spelled |
| C．seemed | D．pronounced |
| A．Mandarin Speakers Are Smarter than English Speakers |
| B．Skilled Ear for Music May Help Language Study |
| C．Pitch Plays a Central Role in Chinese Learning |
| D．Schools Need to Develop Music Programs |
Any foreigner who has tried to learn Chinese can tell how hard it is to master the tones required to speak and understand. And anyone who has tried to learn to play the violin or other instruments can report similar challenges.
Now researchers have found that people with musical training have an easier time learning Chinese. Writing in the online edition of Nature Neuroscience，researchers from Northwestern University say that both skills draw on the same parts of the brain that help people discover ch
anges in pitch(音调)．
One of the study’s authors，Nina Kraus，said the findings suggested that studying music “actually tunes our sensory system”．This means that schools that want children to do well in languages should hesitate before cutting music programs，Dr.Kraus said. She said music training might also help children with language problems.
Mandarin(普通话)speakers have been shown to have a more complex encoding(编码) of pitch patterns in their brains than English speakers do. This is because in Mandarin and other Asian languages，pitch plays a central role. A singlesyllabl
e word can have several meanings depending on how it is intoned.
For this study，the researchers looked at 20 nonChinese speaking volunteers，half with no musical background and half who have studied an instrument for at least six years.
As they were shown a movie，the volunteers also heard an audio tape of the Mandarin word “mi” in three of its meanings：squint，bewilder and rice. The researchers recorded activities in their brain stems to see how well they were processing the sounds. Those with a music background showed much more brain activities in response to the Chinese sounds.
The lead author of the study，Patrick C．M.Wong，said it might work both ways. It appears that native speakers of tonal languages may do better at learning instruments.
【小题1】When learning Chinese，a foreigner will find ________.
| A．he has a difficult time learning music at the same time |
| B．he has an easier time learning music at the same time |
| C．it is hard to master the tones required to speak and understand |
| D．it is easy to use the brain to help him discover changes in pitch |
| A．Because there is the same difficulty in learning Chinese and music. |
| B．Because skills to learn the two make use of the same parts of the brain. |
| C．Because music training might help people with language study. |
| D．Because people who do well in Chinese study do well in music. |
| A．created | B．spelled |
| C．seemed | D．pronounced |
| A．Mandarin Speakers Are Smarter than English Speakers |
| B．Skilled Ear for Music May Help Language Study |
| C．Pitch Plays a Central Role in Chinese Learning |
| D．Schools Need to Develop Music Programs |
s have found that people with musical training have an easier time learning Chinese. Writing in the online edition of Nature Neuroscience，researchers from Northwestern University say that both skills draw on the same parts of the brain that help people discover changes in pitch(音调)．
e lead author of the study，Patrick C．M.Wong，said it might work both ways. It appears that native speakers of tonal languages may do better at learning instruments.