非磁性材料的表面裂纹多采用（）方法检验。
A.磁纷探伤
B.着色探伤
C.射线探伤
D.超声波探伤
参考答案：B
------Is your father a teacher of English in the No.l Middle School?
-------No! But he _________ English there for ten years.
A．has taught
B．has been teaching
C．taught
D．had taught
男性雄激素来自（）
A.甲状腺
B.肾上腺髓质
C.肾上腺皮质束状带
D.肾上腺皮质网状带
E.肾上腺皮质球状带
