【13】 是软件开发人员、维护人员、用户以及计算机之间的桥梁。
参考答案：文档
I was told that a film directed by Feng Xiaogang ________ this coming Sunday. [ ]
A. is showed
B. will be showing
C. will show
D. would be shown
蝗虫的若虫发育到成虫，蜕皮次数总共是（）
A.2次
B.3次
C.4次
D.5次
