读一读,写一写。
____
收拾
漏掉
胸怀
碧绿
—The final round of the competition is coming near. Can I really do well this time?—Believe in ______. You're always the best in our school.
“x>0”是“x≠0”的( )
下图表示细胞膜的亚显微结构,其中a和b为两种物质的运输方式,下列对细胞膜结构和功能的叙述不正确的是