【題組】25
(A)For instance, the memory and graphics requirements of Microsoft’s recent Vista operating system spell doom for aging machines that were still able to squeak by a year ago.
(B)An unstated corollary to “Moore’s law” is that at any given time, all the machines considered state-of-the-art are simultaneously on the verge of obsolescence.
(C)In theory, recycling gold from old computer motherboards is far more efficient and less environmentally destructive than ripping it from the earth.
(D)If all sources of electronic waste are tallied, it could total 50 million tons a year worldwide, according to the UN Environment Programme.