下列关于植物的说法正确的是( )
-- What a nice watch! How long you it?
-- For just two weeks.
— Thanks for listening to my problem and giving me your advice, Amy.
— _________. That's what friends are for.
如图是某生物的生殖、发育与遗传的示意图,其中①所示的是受精过程,②所示的是发良过程,请仔细阅读分析回答以下问题: