A:铝制品抗腐蚀能力较强
B:都为固体
C:合金的硬度小于纯金属的硬度
D:熔点都很高
在植物细胞各部分结构中,____ 能够保护和支持细胞;____ 控制着生物的发育和遗传.
Busy as he is, he still comes by and picks me up at his c ____ .
I believe you will have a wonderful time here _______ you get to know everyone else.