________ belongs to the satellite communication system.
A. Satellite
B. Roaming end
C. Ground station
D. Client
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The structure of a digital certificate includes ________.
A. Version Number
B. Serial Number
C. Signature algorithm identifier
D. Private key of the certificate owner
The operation model of C2C e-commerce includes ________.
A. Online auction
B. Third-party trading platform
Classified advertising
D. Online gift model
“ B ” stands for________ in the S2B2C social e-commerce model.
A. Supplier
B. Customers
C. Buyer
Distributor
The Dharma plate launched by Alimama, a digital marketing platform under the Alibaba Group
A. Customer Relationship Management System
B. Personalized recommendation system
C. Online price comparison system
D. Keyword bidding ranking system
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