When we are in a bad mood or ill at ease, as long as we listen to a beautiful song, we will feel better and relaxed. A musical _____ always makes us comfortable. By listening to music, we also can understand the philosophies which _____ the music.

Music not only can change our moods, but also can _____ some kinds of diseases, such as insomnia (失眠). Music treatment has been _____ in many countries recently. It has been _____ that music can make people relaxed, more _____ and have a better sleep. Some music even can promote us to _____ a certain number of natural chemicals from our bodies. Besides, music also has a good effect on strengthening people’s memory. In a university, 60 girl students accepted a (n) _____ , It showed that the girls who received musical training in their childhoods could _____ 17% more reading materials than those who didn’t. Some experts also ______ that musicians’ left brains are bigger in size than ordinary people’s. As we know, our memory is ______ by the left brain. That might be the reason why those who receive musical training have a better memory. ______ , the patients whose speaking is damaged may recover ______ by listening to or appreciating some music.

In addition to these ______, music can also promote children’s intelligence growth and ______ people's life. In some countries, people conducted a (n) ______ experiment. They played music beside vegetables and cows. As a result, the vegetables grew faster and the cows produced more milk. Why does music have so many magical functions? ______ , music influences people in psychological and physical ways.

From a psychological angle, music can impact directly on people's moods and behavior. Music has various rhythms, and so do human beings. When the two kinds of rhythms are in ______, the former can adopt the latter’s psychological rhythms. Usually, people will ______ music’s rhythms to change their movements.

From a physical angle, music is a sound wave which has a range of frequency. The wave can have ______ on people’s every neuron, which can secrete (分泌) some chemicals that are good for our health

   About ten men in every hundred suffer from color-blindness in some way. Women are luckier: only about one in two hundred is affected on this matter. Perhaps, after all, it is safer to be driven by a woman!

There are different forms of color-blindness. In some cases a man may not be able to see deep red. He may think that red, orange and yellow are all shades of green. Sometimes a person cannot tell the difference between blue and green. In rare cases an unlucky man may see everything in shades of green — a strange world indeed.

Color-blindness in human beings is a strange thing to explain. In a single eye there are millions of very small things called "cones". These help us to see in bright light and to tell the difference between colors. There are also millions of "rods", but these are used for seeing when it is near dark. They show us shapes but no color.

Some insects have favorite colors. Mosquitoes（蚊子） prefer blue to yellow. A red light will not attract insects, but a blue lamp will. In a similar way human beings also have favorite colors. Yet we are lucky.

With the aid of the cones in our eyes we can see many beautiful colors by day, and with the aid of the rods we can see shapes at night. One day we may even learn more about the invisible colors around us.

   There's a good chance that something you've bought online has been in the hands of a " picker". These are the workers in warehouses (仓库) who pick, pack and ship all those things we ordered.

At Amazon and other companies, they're working side by side with robots. Experts say while the robots are replacing some human workers, the machines aren't quite ready to take over completely.

When a robot finds its storage unit,' it slides underneath, lifts it up and then delivers it to a worker they're called pickers. On a recent day, the computer told a picker to grab what looked like a fantasy board （#t 3#)game. The picker found it, packed it and placed it on the conveyer belt.

"In a traditional fulfillment center where the workers would walk to the different items, it can take hours to fulfill a customer order," Robinson says.

Now, with the help of robots, that task takes minutes and fewer humans.

So is this a sign that we're entering a new industrial revolution?

" It's definitely going to take over a lot of jobs ", says Karen Myers, a scientist at SRI, one of Silicon V alley's oldest research centers.

At the same time, she says, " We're running against the limits of technology. " Take the picker at the Amazon fulfillment center for example. Myers says those skills prove to be uniquely human.

"Our fingers are incredibly flexible and the current generation of robotic operators are getting much, much better," she says. "But they're just not quite there yet."

There's also the robot's brain.

Remember that board game the Amazon worker was looking for? She could barely see the box when it was filled into the storage bin——but she could tell it was a board game. Robots can't do that.

Technologists say that, increasingly, humans will work side by side with robots——instead of robots working alone.

Amazon says robots and humans enabled the Tracy warehouse to fulfill customer orders faster. That means more customers and more human workers.

   Is sleep important to children？A new study says yes.

A new study published this week shows that children who do not get _____ sleep have less control over emotions and are less focused at school.

The National Sleep Foundation _____ 10 to 11 hours of shut-eye per night for children aged between 5 and 12. About 41 million American workers get less than six hours of sleep per night. Now health experts _____ that adults are passing their poor sleeping _____ down to their children.

Reut Gruber is a lead author of the new study. In the study，Gruber and other experts either added or reduced one hour of sleep for _____ children aged 7 to 11. They _____ the children over five nights. The _____ was to see if small changes in the amount of sleep could _____a child's behavior.

“The findings show that for children small changes can make a big _____，and that is why this is meaningful.”

Before the survey began, students were _______to sleep the same amount of hours as they ______ would. Their teachers were asked to ______ the children on thoughtfulness, touchiness and emotional reactions. After five nights of the kids' sleep change, the teachers were asked to take the survey again. ______ their original scores, those who slept one hour less had ______ behavior scores than those who were allowed to sleep an hour more.  Students with less sleep were more annoyed, frustrated and had more problems which need paying ______ to.  The children with more sleep showed ______ in these areas.

“______ less sleep leads to a drop in attention in class, children may ______ on learning and chances to be ______. If they are easily annoyed and frustrated because their bodies and brains are ______, they may not learn as much either,”says Gruber.