在生物的遗传中具有重要作用的细胞结构是( )
A：细胞壁
B：细胞膜
C：细胞质
D：细胞核
Yao Ming put his effort _____ basketball training _____ a very young age.
已知两个大小不同的数之和是364，大数去掉个位数字后就等于小数，大数是（ ）
—Tiring! The road is being widened, and we ______ a rough ride.
