问题详情

Our organization has developed over 15,000 International Standards on a (141) of subjects. The full range of technical fields can be seen from the listing of International Standards. Users can browse that listing to find bibliographic information on each standard and, in many cases, a brief (142). The following links lead to further information about specific standards or families of standards. The listing, which reflects the standards users most often ask about, will be further developed and extended (143) user demand.
(41)
A．varying
B．vary
C．various
D．variety subjects.