直立百部的性状特征有
A.纺锤形
B.表面棕黄色,有深纵皱纹
C.断面纤维性
D.气微,味甘、苦
E.皮部较宽,中柱多扁缩
参考答案:A,B,D,E
—Jim, Tom is looking for his English book. Is this ______?
—No, that is______. I don’t know wherehisis.
A.his, mine
B.he, mine
C.him, mine
D.his, my
互素多项式的性质,若f(x)h(x),g(x)h(x),且(f(x),g(x))=1,那么可以推出什么?()
A、f(x)g(x)|h(x)
B、h(x)|g(x)
C、h(x)|g(x)f(x)
D、g(x)|h(x)