城市道路按其承担的交通功能一般可以分为：城市快速路、主干道、次干道和支路。（）
查看答案
8051MCU的T0/T1对外部脉冲计数时，外部脉冲高、低电平的宽度应≥1个机器周期。（）
Members of the government acknowledge that many of their predictions were over-optimistic. =＞ Members of the government acknowledge many of their predictions ____ over-optimistic.
微信支付 
支付宝支付