Protect Wild Animals

    Animals are our good friends．We live in the same Earth．Animals and people can't  be separated from each other．But some animals are getting less and less．So it's important to us to protect animals，especially wild animals．Some people kill wild animals because of money．It's wrong．Now people need more places to live in．We explore the forest．  Animals have less places to live in．The number of wild animals decreases year by year．So we should protect wild animals．

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汉武帝作为一位有作为的帝王，在政治体制上开设中、外朝，形成两个官僚系统：一个是由大将军、尚书等组成的中朝，又称内朝或内廷，是决策机关；一个是以丞相为首的外朝，是政务机关。导致这种局面的根源是（    ）