题型:名词解释 -Why are you watching a football match?-__________[ ]A. It's exciting.B. I have a football.C. I'm at home.D. I watch football matches at night. 查看答案
题型:名词解释 丝绸摩擦过的玻璃棒带______电,这是因为玻璃棒在摩擦过程中______(得到/失去)了电子.用钢笔吸墨水时,用手捏橡皮管后再松开,墨水就被吸进橡皮管里去了,捏橡皮管的目的是______;松开时,墨水在______的作用下进入橡皮管中. 查看答案