A:门齿
B:臼齿
C:犬齿
D:蝺齿
Food aid______ is not enough to ______ the problem _______ now.
右图是探究铁锈蚀条件的装置。调节L端与R端的液面高度一致,塞紧木塞,一周后观察。下列推断错误的是