乌龟的运动方式是[ ]
A.爬行
B.蠕动
C.跳跃
D.攀援
答案:A
下列物质或细胞结构中,没有核糖参与组成的是______。
A.转运RNA B.质粒C.核糖体 D.ATP
But for the help of my English teacher, I () the first prize in the English Writing Competition.
A. would not win
B. would not have won
C. would win
D. would have won