Steven can play football very____(good).
I have a____.
一般来说,输血时应以输____血为原则.
读图,图中①—⑥分别代表岩浆、沉积物、喷出岩、侵入岩、沉积岩、变质岩,试判断图中代表沉积岩、变质岩分别是( )