But Cboset wondered if his snakes might be useful for medicine as well. For some heartsurgeries, the doctor has to open a patients chest, cutting through the breastbone. Recoveringfrom these surgeries can be very painful. What if the doctor could perform the operation byinstead making a small hole in the body and sending in a thin robotic snake?

　　Choset teamed up with Marco Zenati, a heart surgeon now at Harvard Medical School, toinvestigate the idea. Zenati practiced using the robot on a plastic model of the chest and thentested the robot in pigs.

　　A company called Medrobotics in Boston is now adapting the technology for surgeries on people.

　　Even after 15 years of working with his teams creations, I still dont get bored of watching the motion of my robots, Choset says.

Choset began to build robots in high school.

A．Right

B．Wrong

C．Not mentioned

17、 Snake robots could move in only four directions.

A．Right

B．Wrong

C．Not mentioned

18、 Choset didnt begin developing his own snake robots until he started working Carnegie Mellon.

A．Right

B．Wrong

C．Not mentioned

19、 Chosets snake robots could make more movements than the ones others developed.

A．Right

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