Sometimes I take a No.28 bus to work.
A:by
B:catch
C:get
贫血患者,应该多吃含_______丰富的食物( )
23 + 13 + 57 ____ 1118 56 + 58 + 34 ____3
78 -( 13 + 12 )____0 1+ 12 - 13 ____ 16
910 - 23 + 110 ____1
小明标出了下列四种情况下磁体的磁极(小磁针的黑端为N极),其中正确的是( )