A:气球缩小,红墨水左移
B:气球缩小,红墨水右移
C:气球胀大,红墨水右移
D:气球胀大,红墨水左移
马克思主义诞生的标志是( )
—Where are you going for your winter holiday?
—I’m going to visit Kunming. It is ______ too hot _______ too cold.
属于纯净物的是( )