Task 4 (注意:答案请填写对应单词的大写字母) Directions:The following is a list of terms related to the supply chain. After reading it, you are required to find the items equivalent to these given in Chinese in the table below. Then you should mark the corresponding letters with a single letter through the center in order of the numbered blanks, 51 through 55, on the Answer Sheet. A—Acquisition cost B—Actual costs C—Arrival notice D—Balance of trade E—Bill of lading number F—Buyer behavior G—Cash conversion cycle H—Certificate of origin I—Chain of customers J—Credit level K—Customer relationship management L—Duty free zone M—Electronic commerce N—Free trade zone O—Indirect cost P—Minimum weight Q—Net weight