【单选题】If you have any questions, please go and ask______.
A.
the responsible person for the activity
B.
the person responsible for the activity
C.
the activity's responsible person
D.
the person for the activity responsible
【判断题】与其他运输方式相比,火车有速度快、 舒适、安全、省时、灵活性大和适合中远程旅游等优点,深受旅游者的喜爱。 ( )
【多选题】( ) 45 、火车运输的优点有 __________ 。
【单选题】. Each of you ______ responsible for the accident.
【单选题】Who do you think should be responsible ( )this?
【简答题】三极管具有电流放大作用,即( )的微控制了( )的较大变化。
【简答题】三极管具有电流放大作用,即 ( )微小的变化,就可以引起 ( )较大变化。