【单选题】What’s the writer’s favourite hobby? ________.
A.
Playing golf with his sons.
C.
Collecting Chinese musical instruments.
D.
Collecting music books.
【单选题】Who is the writer of “Sons and Lovers”?
【判断题】The writer ’ s sons came to the pine tree often after their grandmother died because their grandmother used to take them there.
【简答题】某有机化合物A的结构简式如下: (1)A分子式是____________ 。 (2)A在NaOH水溶液中加热反应得到B和C,C是芳香化合物。B和C的结构简式是B:__________ , C:_____________ 。该反应属于________________反应。 (3)室温下,C用稀盐酸酸化得到E,E的结构简式是____________ 。 (4)在下列物质中,不能与E发生化学反应的是__...
【简答题】(7分)溶液是生活中常用的混合物。 (1)硫酸铜溶液可用于游泳池消毒,硫酸铜溶液中的溶质是 。 (2)市售的过氧乙酸(CH 3 COOOH)溶液中溶质的质量分数大多为40%,稳定性差,室温下就可分解成乙酸(CH 3 COOH),并释放出氧气,该反应的化学方程式为 。将40% 的过氧乙酸溶液稀释成2%,可用于空气消毒, 稀释过程中浓溶液与所加水的质量比为 。 (3)甲、乙两种固体物质的溶解度曲线如图...
【判断题】The writer’s sons came to the pine tree often after their grandmother used to take them there.
【单选题】In the writer's opinion, laws and manners ______.
C.
can be important if you dine in a restaurant