portable便携式的。根据前文“to create wireless phones that could work in vehicles and also be carried”可知,可以在汽车上工作又可以随身携带的无线电话,应该是便携式的。且下文Cooper made the first public call from a handheld portable telephone on April 3, 1973.”也是提示。故选D项。 (5)题详解:...
1D to create wireless phones that could work in vehicles and also be carried可知,可以在汽车上工作又可以随身 携带的无线电话,应该是便携式的 下文“Cooper made the first public call from a hand-held portable telephone on April 3. 1973." 也是提示 故选Davailable可获得 :suitable合适的; changeable...
Who invented the first cell phone tower? Who used the telephone when it was first invented? Where was the first telephone invented? Who invented the first handheld camera? Who invented the first portable camera? Who invented the first phone charger?
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Cooper made the first public call from a handheld portable telephone on April 3, 1973. The device, called Dyna TAC,___about 1.1 kilograms and was 23 centimeters long. Today while Cooper is pleased that his___has opened up a series of technological possibilities for cellphone users, he think...
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He was the inventor of the Maxim Gun – the first portable, fully automatic machine gun – and an elaborate mousetrap. He laid a claim to inventing the lightbulb, and even experimented with powered flight, but his large aircraft designs were never successful. However, his "Captive Flying ...
For anyone who wants to be prepared for power failures during storms, or needs to power their favorite tech gadgets while camping, the Yoshino B4000 solid-state solar generator is the world's first portable power station that relies on a solid-state battery for enhanced saf...
For anyone who wants to be prepared for power failures during storms, or needs to power their favorite tech gadgets while camping, the Yoshino B4000 solid-state solar generator is the world's first portable power station that relies on a solid-state battery for enhanced safety. It provides 2....
I wished my mother were there to share it with me. I poured slowly, watching the cream swirl in the cup. It made the confusions and indignities of last night seem a little more worth it; I felt even better when Betty said, “And your new clothes have come, too.” ...