商代出现(),釉色青绿而带褐色,胎亦较硬,呈灰白色。
A.白陶
B.灰陶
C.釉陶
D.黑陶
参考答案:C
Tom made _____ great progress last semester and as _____ result, he was praised by the teacher.
A.a; a
B.a; /
C./; /
D./; a
正装梯度电极系测出的视电阻率曲线在高阻层出现极大值的位置是()。
A.高阻层顶界面
B.高阻层底界面
C.高阻层中点
D.不确定