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.

   As the pace of life continues to increase, we are fast losing the art of relaxation. _______ you are in the habit of rushing through life, being on the go（忙碌）from morning till night, it is hard to _______. But relaxation is _______ for a healthy mind and body.

Stress is a（n）_______ part of everyday life and there is no way to _______ it. In fact, it is not the bad thing that it is often supposed to be. A _______ amount of stress is important to provide motivation and give _______ to life. It is only when stress gets out of control that it can lead to poor performance and _______ health.

The amount of stress a person can bear _______ very much on the individual. Some people are not afraid of stress, and such a ________ is obviously chief material for managerial responsibilities. Others lose heart at the ________ of unusual difficulties. When exposed to stress, in whatever form, we ________ both chemically and physically. In fact we make a choice between ________ and fight. And in more ancient days the choices made the ________ between life and death. The crises we meet today are ________ to be so extreme, but however little the stress, it requires the same response. It is when such a reaction ________ long, through continued exposure to stress, that health becomes ________. Such serious conditions as high blood pressure and heart disease have ________ links with stress. Since we cannot ________ stress from our lives we need to find ways to ________ it.

So what do you think of stress? What is your way to deal with it?

Jumping spiders (跳蛛) are vital for agricultural pest control, and 【小题1】 species can even learn to distinguish (辨别) the color red in their prey (猎物), a 2015 study 【小题2】 (show). They are able to learn to associate this color 【小题3】 poisonous prey and avoid it or find out high-quality prey.

Jumping spiders will eat almost any small pest, 【小题4】 (range) from caterpillars to flies. Not only does this 【小题5】 (natural) reduce the amount of agricultural damage from insect pests, but it means farmers can avoid using chemical treatments 【小题6】 (protect) their crops.

In total, a large number of jumping spiders, over 5,000 species, 【小题7】 (find) on every continent except Antarctica by now. Being able to adapt to the environment is a key evolutionary skill. Since the spiders are able to distinguish 【小题8】 foods are nutritious, from those that are 【小题9】 (harm). They can stay alive longer and manage a wide 【小题10】 (various) of pests.