How about going to Hang Kong? It has ______for everyone.
A:everything
B:something
C:anything
D:nothing
有以下四种构造:①表皮②细胞核③西红柿④果肉细胞.将它们按由简单到复杂的层次关系排列,正确的顺序是( )
用电流表测甲如图甲所示电路的电流.