【简答题】He _____ the er of driving after
drinking wine.A. has
warned of B. has
warned C. has
been warned D. has
been warned of
【单选题】Richard __________ injured in the car crash,but I didn’t stop him driving after he drank some beer.
【简答题】地面空气进入矿井后,其成分和性质发生哪些变化?
【判断题】在安全色标中红色表示禁止、停止或消防。()