题目内容
数据API中获取缓存信息的方法为Object wx.getStorageInfo()，用于异步获取当前storage的相关信息。
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删除和清除缓存的方法为wx.clearStorage(Object object)，用于清理本地数据缓存。
网络连接分为监听网络状态变化事件和获取网络类型两个方法。
Botany, the study of plants, has a highly valued position in the history of human knowledge. From what we have1)______of preindustrial (工业化以前的) societies, a detailed study of plants must have been pretty ancient. Plants are the2)_____of food for all living things, even for some other plants. They have always been3)______important to human beings, not only for food, but also for clothing, weapons, tools, medicines, shelter, and many other4)______. People who lived in the jungle of the Amazon can recognize a wide5)______of plants and know their properties. To them, botany has no name and is probably not even recognized as a special branch of “knowledge” at all.However,6)______, the more industrialized we become, the farther away we move from direct contact with plants. Now not many people have a reasonable7)______of botanical knowledge. About10,000 years ago, when our ancestors8)_______that certain grasses could be harvested and their seeds could be planted the next season, the9)______between plants and humans was formed. As a result crops were10)______. From then on, humans live on the production of plants.
机床夹具都由哪些部分组成？
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