一切哲学都是
A.系统化理论化的世界观
B.自然知识、社会知识、思维知识的概括和总结
C.最抽象的含有阶级性的意识形态
D.世界观和方法论的统一
参考答案:A,B,C,D
He has some trouble ______ his classmates, but he has no trouble ______ doing his lessons.
A.with; with
B.in; in
C.with; in
D.in; with
定金应当以书面形式约定,定金合同从实际交付定金之日起生效。
A、正确
B、错误