People sometimes want to share their experiences, they post photos of the food they eat.
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Some chefs start food blogsthey want to write cookbooks.
Travelers often want to learn about local foods, they read food blogs before they travel.
氧化物矿物和氢氧化物矿物是一系列金属阳离子与O2-与OH-相化合的化合物。
A. 对
B. 错
惰性气体型离子（Mg、Al、Si等）的氧化物和氢氧化物通常为无色、白色或浅色的颜色及条痕，玻璃光泽为主，透明～半透明。
A. 对
B. 错
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