A:14
B:1144
C:524
D:36121
—Yes, you can. _______ you must wash your hands first.
càn làn
zhú gān
jìng jì
bēn téng
____
(2013·宁波)若右图中猫的头部位置保持不变,把镜子沿MN截成两半,并分别向两侧平移一段距离,则猫的头部通过左、右两半面镜子( )
腔肠动物和扁形动物的共同特征是( )