大豆胞囊线虫病的发生和流行主要决定于()、()、()和()等。
参考答案:土壤条件;耕作制度;气候条件;作物种类
It is the film _______ director is Steven Spielberg _______ attracts quite a few viewers throughout the world.
A.that; who
B.which; that
C.whose; that
D.whose; who
简述伏特加的分类。