I don't think the girl is right, _____? [ ]
A. do I
B. is she
C. isn't she
D. does she
答案:B
形成三圈环流的根本因素是
A.海陆热力性质的差异
B.地球自转偏向力
C.太阳辐射高低纬的受热不均
D.气压带和风带的季节移动
施行记帐调查法时需要注意那些?