I have two grammars, ______are of great use. A. all of which B. either of which C. both of that D. both of which 答案:D主句中的two表明不能选A.从句中的are表明不能选B. both of which用来引导非限制性定语从句.阅读《中国土特产品出口统计表》,下列结论不正确的是
[ ]A.茶叶和生丝的生产逐渐商品化 B.中国逐渐卷入资本主义世界市场C.中国在对外贸易中逐渐取得优势 D.中国的茶和生丝的出口量持续增加