西门达尔牛原产于(),体色为()。因产奶和产肉性能都较强,故又称兼用型牛。
参考答案:瑞士;白色
What _____ your favorite musician _____? [ ]
A. does; like
B. is; look like
C. is; looking
D. does; look like
简述西斯蒙第的经济危机理论。