腐苔的辨苔要点是（）。
A.颗粒疏松
B.刮之不脱
C.揩之可去
D.形如豆腐渣
E.油腻黏液
参考答案：A, C, D
下列方法中，不能判断出物体有无磁性的是[ ]
A．将物体悬挂起来，看有无指向性
B．将物体靠近小磁针看能否排斥小磁针
C．将物体靠近小磁针看能否吸引
D．看物体能否吸引铁钴镍等物质
---Could you please tell me ___________? ---Of course. For over ten months.
A．how long has he left school
B．how long he has left school
C．when he left school
D．how long he has been away from school
