【判断题】能抗酸的缓冲溶液不能抗碱,能抗碱的缓冲溶液不能抗酸。
【单选题】这个房间有股霉味,一定是好久没人住了。
A.
The room smells of stale air. It must have been vacant for a long time.
B.
The room is full of not fresh air. There is on one in for a long time.
【判断题】飞行训练、表演、比赛时模型飞机在飞行中无论何时越过场地的安全线就是对参加活动的人群构成了安全威胁,因此必须指令遥控模型飞行员立即降落模型飞机。
【简答题】这个房间有股霉味,一定是好久没人住了。 The room stale air. It for a long time.
【简答题】这个房间有股霉味,一定是好久没人住了。 The room ______ of stale air. It must have been ______ for a long time.
【简答题】The room _________. It must have been _______ for a long time.这个房间有股霉味,一定是好久没住人了。
【简答题】A.switching B.diverting C.modifying D.altering