【单选题】下列说法正确的是( )
B.
油脂是高级脂肪酸的甘油酯,均不能发生氢化反应
C.
H 2 N-CH 2 -COOH既能与盐酸反应、又能与氢氧化钠溶液反应
【简答题】During the day we work and play, and at night we sleep. Our body rests while we sleep .In the morning we are ready to work and play again. Our body grows most while we are asleep. Children who are tir...
【简答题】Work and play (be)______ not equally rewarding.
【单选题】既能发生酯化反应,又能与氢氧化钠反应的是
【单选题】电流是由电子的定向移动形成的 ,习惯上把( )定向移动的方向作为电流的方向。
【简答题】Internet is not such an word as it used to be. It has changed the way we live, work and play.
【单选题】下列化合物中,既能与氢氧化钠作用,又能发生酯化反应的是( )。