灵芝的药用部位为( )
A．干燥菌核B．干燥子实体C．子座及昆虫尸体的复合体D．油胶树脂E．香树脂
参考答案：B
下列哪项不符合胃溃疡癌变的特点（）。
A.上腹痛的规律性消失
B.食欲减退
C.进行性贫血、消瘦
D.大便隐血持续阳性
E.反酸烧心加重
______provided the methodological foundation for materials for the teaching and its principles formed the basis of such widely used series as English 900 and Success With English.
A. The Direct Method B. The Oral ApproachC. The Audiolingual Method D. The Communicative Approach
