粤北深山发现奇特“青蛙”,如图所示,青蛙属于两栖动物.将青蛙生殖的各个阶段按正确的顺序排列( )
①求偶 ②产卵 ③受精 ④抱对.

A.①→④→②→③
B.①→④→③→②
C.④→①→②→③
D.④→①→③→②
0 54697 54705 54711 54715 54721 54723 54727 54733 54735 54741 54747 54751 54753 54757 54763 54765 54771 54775 54777 54781 54783 54787 54789 54791 54792 54793 54795 54796 54797 54799 54801 54805 54807 54811 54813 54817 54823 54825 54831 54835 54837 54841 54847 54853 54855 54861 54865 54867 54873 54877 54883 54891 150026
①求偶 ②产卵 ③受精 ④抱对.
A.①→④→②→③
B.①→④→③→②
C.④→①→②→③
D.④→①→③→②