桶状货物可采用的堆码方式与（）相同。
A.金属板
B.空调
C.钢轨
D.缸
参考答案：D
This is one of the best films that ___ this year. [ ]
A. is appearing
B. appear
C. has appeared
D. have appeared
著录内容识别符号怎么运用？
