“春种一粒粟,秋收万颗籽”,一棵参天大树也是由一颗种子发育来的,其实是因为种子中包含有发育成一株完整植物的( )
A:营养物质
B:水分
C:无机盐
D:胚
河蚌的运动主要依赖于( )
— Why was Professor Zhang unhappy recently?
— Because the theory he insisted on _____ wrong.