题目

阅读理解Humans have been inventingthings from the beginning of time. Some of the most famous inventions are socommon in our everyday lives that we no longer think of them as inventions.Here are some inventions from different centuries. THE TELEPHONEIn 1876, Alexander Graham Bellbuilt the first telephone that transmitted (传输)human voiceby electricity. Then telephones rapidly became an indispensable part of ourlives. THE COMPUTERThere were many important eventsin. the history of computers. In 1941, Konrad Zuse built the world's firstprogrammable computer. THE COTTON GIN(轧棉机)A modem如右图，数轴上点N表示的数可能是（    ） A．       B．       C．       D．