来证规定：“Documents to be presented within 14 days after the date of B/L，but in any event within the credit validity”，假设最迟装运期为9月10日，实际装运日为9月6日，信用证有效期为9月25日，出口商最迟应在（）交单。

A:9月5日 B:9月10日 C:9月15日 D:9月20日 E:9月25日

效度（Validity）

validity

Validity is the degree to which a test measures what it is meant to measure．There are four kinds of validity, i.e.content validity,construct validity, empirical valiodity, and face validity．

If the exporter can not deliver the goods in times．he may ask the importer to extend the validity． ( )

When one of the original bills of lading was surrendered to the carrier, the others became（ ）.

A:valid B:validity C:invalid D:A+B

汉译英：“无法律效力的”，正确的翻译为( )。

A:valid B:validity C:value D:void

______ of this Deratting Exemption Certificate is hereby extended until 4th Oct ．2007 as the vessel is laden with cargo ．

A:Validity B:Valid C:Validation D:The coming into force

The validity of this certificate is ， in accordance with article 19(4)(a) of the Convention ，______ until Jan 1 2003.

A:stretched B:expanded C:enlarged D:extended