用于作染料的胡萝卜素 ( )
A.16
B.17
C.18
D.19
参考答案:C
解析:归税号3203.0019。根据32章税目条文,按具体品目列名归类。
Compared to manila line,size for size, nylon line().
A.has less strength than manila line
B.has more strength than manila line
C.is equivalent to manila line
D.will rot quicker than manila line
在Visual FoxPro中,嵌套查询是基于( )的查询
A.2个关系
B.3个关系
C.多个关系
D.2个或3个关系