海关对进出境物品监管的基本原则是：
A．自用原则
B．合理数量原则
C．直接需用数量原则
D．自用、合理数量原则
参考答案：D
— Has the little boy who saved the drowning girl left the school?
— Not yet. He _______in Room203 of the teaching building right now.
A．in interviewing
B．is interviewed
C．has interviewed
D．is being interviewed
力的国际单位是（）
A、吨
B、牛顿
C、公斤
D、兆帕
