One day, you might be ordering your favorite pizza from a robot.Researchers at a university in Pittsburgh, Pennsylvania, are working on creating a pizza-making robot.

“Robots are basically preprogrammed to repeat the same actions over and over,” says David Held, a robot expert from Carnegie Mellon University, and one of the members of a pizza-making team．But making pizza has challenges.For instance, the flour (面粉) will become squishy when meeting water, with a shape that can change in many ways.Also, pizza-making requires many steps—such as rolling and cutting—and several tools, including a rolling, a knife and so on.In what order should the steps be done? Which tools should be picked, and when? “If you need to do a cooking task, there are several levels that you have to reason about,” Held says.Once people get the hang of it, “We don’t even need to think about exactly how we’re doing it- it sort of just happens.But robots can’t really “understand what to do on their own”.

To start, the team used a computer to consider how a robot could lift, fatten, gather, move and cut dough (生面团).The method has two levels of robotic reasoning: one that thinks how it should approach the overall task, and the other that thinks how it should move its “hands” to perform each action．The result was better than with the usual programming techniques.“We got a little bit closer to the right shape than the former methods,” Held says．“‘But there’s still a lot of room for improvement.”

For now, people will continue to make pizza the old-fashioned way: with their own hands.Sill, a pizza-making robot is a good goal.And if a robot could deal with dough, it could also work with other objects that can change shapes.“You can imagine robots helping in hospitals, or robots that clean up toys in day cares,” Held says.“The general goal is to eventually have robots that can help with whatever the task may be.”

【小题1】What does the underlined word “squishy” in paragraph 2 mean?

A．Soft.

B．Dirty.

C．Plain.

D．Precious.

【小题2】What is a challenge for pizza-making robots?

A．Separating flour from water.

B．Doing all the steps in order.

C．Using several tools at once.

D．Repeating the same actions.

【小题3】What does paragraph 3 mainly talk about?

A．Methods of moving a pizza.

B．Problems with pizza making.

C．Improvements to the pizza robot.

D．Suggestions on how to make pizza.

【小题4】What does Held say about the development of robots in the future?

A．They will help humans in different fields.

B．They will replace humans to do all the work.

C．They will do better than humans in day cares.

D．They will do whatever task as well as humans.