A:建立者是施莱登、施旺
B:一切动植物都由细胞发育而来
C:新细胞可以从老细胞中产生
D:揭示了生物体结构的多样性
both different/the same both like each other always/usually/often ... play football/basketball... help people cross the street/carry the bags
I am…… .……is/are my good friend/friends. We ……
Leo has a small____(脸).
在萝卜、大豆、玉米、白菜四中植物中,将萝卜和白菜划为一类,是因为( )