【单选题】—Mum, look! My trousers _____ short. Can you buy me a new _____? —OK.
【单选题】电荷有规则的定向移动称为电流。凡方向不随时间变化的电流称为_____。
【简答题】电荷有规则的定向移动称为电流。凡大小和方向都随时间变化的电流称为()。 (A)直流电流 (B)稳衡电流 (C)交流电流 (D)稳压电流
【简答题】读句子,排序。 ( ) Good morning. Where are you going this afternoon? ( ) At 3 o'clock. ( ) Buy a pair of shoes. ( ) When are you going? ( ) Good morning. ( ) What are you going to do?...
【单选题】These are ______________. You can buy a pair for your mother. [ ]
【单选题】You can help a disaster victim buy a new pair of glasses if you donate ______.
【简答题】电荷有规则的定向移动称为电流。凡方向不随时间变化的电流称为()。 (A)直流电流 (B)稳衡电流 (C)交流电流 (D)稳压电流
【单选题】—____ —I want a pair of shoes for my son. [ ]