A Because seismometers are too insensitive to monitor earthquakes. B Because seismometers are costly and not evenly distributed on the earth. C Because fiber-optic cables are easily available around the world. D Because fiber-optic cables are considered as the backbone of the Internet.

A how the seismic energy is monitored by seismologists B how the p wave and the s wave are utilized by seismologists C how the earthquake is located by a seismometer D how the earthquake is detected by the fiber-optic cable

A It can be more easily installed by network providers. B It can be more easily available all over the world. C It can be used to study the ocean basins more easily. D It can be more easily used and studied by seismologists.

A the sensor cannot be easily placed near a volcano safely B the infrastructure to deploy the sensor is not easily available C the cable and battery can be easily damaged by water D the water in the ocean is more corrosive and destructive

A Seismometers Can Monitor Earthquakes B Fiber-optic Cables Can Locate Volcanoes C Dark Fiber Networks Can Sense Seismicity D Offshore Cables Can Predict Earthquakes

A By crafting artificial shapes and patterns into the eyes of the blind with visual device. B By stimulating device in the visual cortex of the blind with certain electrical currents. C By implanting phosphenes into the brains of the participants who are blind in adulthood. D By tracing out shapes when light reflects off an object and enters the eyes of the blind.

A there was a lack of connection between each two separate electrodes B the phosphenes didn't appear in their assumed zones of the brain C the participants couldn't accurately retell the shapes on the touch screen D the brain wasn't tuned enough to detect changes in the environment

A go deep into B set right C see through D operate on

A It is desirable to get the electrode tips closer to the neurons of patients. B It may be dangerous for some patients to get deeper electrode implants. C Electrodes may directly reach the cortex of the patients by eye surgery. D Penetrated implants probably can bebeneficial to most of the patients.

A Electrodes—an Artificial Device Implanted in the Brain B Visual Cortex—the Crucial Region in Blindness Treatment C Scientists Found a Revolutionary Way of Blindness Treatment D Major Difficulties in Treating Blindness with artificial devices