单项选择题

In parasitism, which partner is benefited?

A．Parasite
B．Intermediate Host
C．Final host
D．Final host

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多项选择题

The key technologies of smart grid big data include ( ) . A. Data acquisition, data storage B. Data Processing C. Data analysis mining D. Data Visualization E. Data Security and privacy protection

单项选择题

手绘表现已经被电脑表现全部取代。
A、正确
B、错误