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2011.07-虞美人盛开的山坡许是寺庙确实比别处不同，他很快就沉静下来。Time relays are divided into two types: on-time delay type and off-time delay type, and their symbols are shown in the following figure. For the power-on delay type time relay, when the coil is powered on, the power-on delay type contact acts after the delay time (the normally closed contact is opened and the normally open contact is closed), and the contact immediately returns to normal after the coil is powered off; For the power-off delay type time relay, when the coil is powered on, the power-off delay type contact acts immediately (the normally closed contact is opened and the normally open contact is closed). After the coil is powered off, the contact will not return to normal until the delay time is passed.2. As a Cheng Yuan who has been engaged in machine learning for more than two years, seeing the computer series you recommended also thinks it is very unreliable. I have read most of the books you recommended. In particular, novice readers are not recommended to read "Introduction to Algorithms" and "Data Mining: Concepts and Technologies". These two books are thick and heavy. Although the content is also good, you will not know the year of the monkey when you finish reading them. What does a novice need? It's getting started! Secondly, have you really finished reading Python Core Programming? This book is not for Python newcomers. It is very thick and difficult. It is very unfriendly to newcomers. And if you just want to be AI, then many parts of this book don't need to be used. Is web development and Django framework really necessary for our AI engineers? No. Xiao Bai has no distinction between key and non-key points in a book. He spent a lot of time learning unnecessary knowledge, which really does more harm than good. Giving guiding and targeted recommendations is responsible recommendation.…,项羽续道：好了，我们再辛苦一下，率领全军继续驱赶汉军，将他们全给我赶下河去，至于生死那就看他们的造化了……西楚国的将领们脸上全都露出一丝阴冷的笑容，这条命令下达。In just a few months of applying intelligent shopping guides, Osaka Weaving House has also explored a new way of playing-transforming sales orders into interactive and interesting "game tasks", which are collected by different "levels" of shopping guides. At the same time, a "introduction" is set for each level of "game tasks" to guide the shopping guide to better complete the target tasks.