采用全双工通信方式，数据传输的方向性结构为 (50) 。
参考答案：A
解析： 全双工通信可以在两个方向上同时传输。
—Whose storybook is that?
—It must _____Tom. I saw him reading it just now. [ ]
A. belongs to
B. belong to
C. be belong to
已曝光未冲洗的电影胶片
