单选题
Modern computers are electronic and{{U}} (8) {{/U}}devices. The basic building block of a modem computer is a{{U}} (9) {{/U}}.
单选题
A) chemical B) digital C) phisical D) anal0g
【正确答案】
B
【答案解析】[解析] 译文：现代计算机是电子数字设备，其校心部分是芯片。
单选题
A) chip B) tube C) transistor D) switch