"Clean collection" means collection of ______ not accompanied by commercial documents.

"Documentary collection" means collection of

(1)______ documents accompanied by (2) ______ documents.

(3)______ documents not accompanied by (4)______ documents.

The expression "opt out of such data collection" (in the last paragraph) probably means ______.

A．pick out from such data the information one needs

B．shift through such data to collect one' s own information

C．evaluate the purpose for such data collection

D．choose not to be involved in such data collection

参考答案：错误

A clean bill of lading means that the bill of lading is very clean．()

A．正确

B．错误

参考答案：错误