题干
Don't worry about him. He's old enough to __________ himself.
A：put on
B：wear
C：dress
D：have on
答案(点此获取答案解析）
C
Don't worry about him. He's old enough to __________ himself.
A：put on
B：wear
C：dress
D：have on
手机的功能和通信服务的要求也越来越高，这使得3G（第三代移动通信）应运而生，随着3G时代的到来，一个由设备生产、终端制造、信息服务构成的庞大产业链正在壮大。这表明（ ）