A:温度低、盐度高
B:温度高、盐度高
C:温度低、盐度低
D:温度高、盐度低
如图,在平行四边形ABB1A1中,∠ABB1=60°,AB=4,AA1=2,C,C1分别为AB,A1B1的中点,现把平行四边形ABB1A1沿CC1折起如图2所示,连接B1C,B1A,B1A1.求证:AB1⊥CC1
— There is milk in the fridge. Please buy some on your way home.
— All right.
关于俄罗斯的叙述,不正确的是( )