【简答题】液晶显示器的英文缩写为_______,显像管显示器的英文缩写为_______,发光二极管显示器的英文缩写为_______。
【简答题】阴离子聚合引发剂是_____________给予体,___________试剂,属于碱类。
【单选题】Why do teachers give their students a huge lot of homework and examinations? 查看材料
A.
They have a strong sense of responsibility.
B.
They intend to inspire students' interest in learning.
C.
They are demanded to improve students' scores.
D.
They intend to have students work harder in school.
【简答题】能进行阴离子型聚合的单体在结构上都具有 基团,适合阴离子活性中心与双键进行亲核加成反应。阴离子聚合引发剂是电子 体,亲核试剂,属于碱类。