【单选题】乙酰乙酸乙酯用稀碱加热水解,并酸化发生的反应是( )
【简答题】It is a great surprise that almost one q________ of the students in this school have met so many problems. 2.The temperature was far below z________. It was very difficult to start the car. 3.Electric...
【简答题】Indicate the function of it in the following sentences.1. I dropped my watch and it broke.2. The weather forecast says it should be fine tomorrow.3. I don't think it important whether he agrees or...
【简答题】乙酰乙酸乙酯用稀碱加热水解,并酸化发生的反应是( )
【简答题】( )1. Leave the boy______,______he will be quiet soon. ( )2. There is so much work.I wish I______enough time to finish the report now. ( )3. It’s time that the baby______listen to some music....