中国传统信仰体系中的三种象征不包括（）。
A.神
B.鬼
C.妖
D.祖先
参考答案：D
根据射线检测的特点，射线检测对( )缺陷检出率高。
A．裂纹
B．夹渣
C．未熔合
D．白点
The ______ Approach is a grammar based method in which principles of grammatical and lexical gradation are used and new teaching points presented and practised through meaningful situation activities.
