Huawei FusionCompute supports adding hosts in batches. This means:

The ability to add hosts in batches in Huawei FusionCompute significantly streamlines the management of virtualization environments. The correct choice emphasizes that the administrator can utilize a pre-defined template provided by the system to input all necessary information for multiple hosts at once. This supports efficient management, particularly in larger environments where manually inputting each host's details would be time-consuming and prone to errors.

Using a template ensures consistency and reduces the likelihood of mistakes, which enhances operational efficiency. This batch processing capability is crucial for quickly scaling the infrastructure, especially during the initial setup or when integrating new resources.

The other approaches, such as individually filling out information for each host or using only a command line interface, do not take advantage of the efficiency that batch processing offers. Moreover, suggesting there is no limit to the number of hosts added at once would not be accurate, as systems often have practical limits based on architecture and performance considerations.