A-A+
Computers have been getting more popular becau
问题详情
Computers have been getting more popular because______ .
A．they can type letters
B．they can help Americans do everything
C．the Americans want to appear rich
D．they are smaller, cheaper and easier to use
参考答案
正确答案：D
解析：细节题。由第一段第三句“have been making them smaller and cheaper”“have been made easier to use”推知。电脑越来越普及(popular)就是因为smaller(体积小)cheaper(廉价)和easier to use(便于使用)。
