One recent study demonstrates that the brown widow spider is less poisonous than other widow species. The reason for the weaker effect of brown widow bites on humans is possibly because the brown widow does not have much poison as its larger relatives, but it is really a threat to humans as to its poison. The two major symptoms of a brown widow bite were that the bite hurt when it was given and it left a red mark. These two symptoms are not much different from the bite of normal household spiders.

　　There is no specific information regarding the control of brown widows by farm chemicals. Most current advice is what is used for controlling spiders in general. Therefore, most commercially available farm chemicals should work on brown widows. Avoiding a mess of the house and the garage should reduce nest sites for them. Also, one should store garage items in plastic bags where there might be interactions with spiders. These items include rarely worn garments such as gardening clothes and gloves, recreational items like sports equipment (i.e., baseball gloves) and other items where spiders can crawl up into holes where fingers can be inserted.

　　文章大意：本文介绍了褐寡妇蜘蛛的生活习惯并提醒我们它们有毒。

　　60．The author wrote this article to________.

　　A. announce the result of a research on spiders

　　B. introduce the ways to get rid of the spiders

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