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B. Women: singles, doubles比如当年的楚国和秦国，武陵蛮遭到待遇就更不用提了。Printing the screenshot above, we can see that the subscriber receives every message from the publisher. However, for Xiao Hong, she only wants to receive messages with red color and does not want to receive messages with black color. Therefore, we need to make the following modifications to the code. We can first add a key so that the subscriber can only subscribe to messages of interest to herself. The code is as follows:Another example is that a big sword will have the same effect, but it is worth mentioning that whether the weapon has sufficient contact with the BOSS will also affect the weakness damage. For example, if the same part is completely cut, it will be yellow, while only the tip of the sword will be wiped, and only about half of the damage will be white.Different from other malicious data tampering or hijacking attacks, DDoS is simple and crude, and can directly destroy the target. In addition, compared with other attack methods DDoS, the technical requirements and the cost of launching the attack are very low, only some server permissions need to be purchased or a batch of broilers need to be controlled, and the corresponding attack speed is very fast and the attack effect is visible. On the other hand, DDoS is easy to attack and difficult to defend. In order to ensure the needs of normal customers, service providers need to spend a lot of resources to fight against the attack initiator. These characteristics make DDoS a very good sword in the hands of hackers and a thunderbolt.Canoe