,交换积分次序得()[其中f(x,y)是连续函数]。

作者: tihaiku 人气: - 评论: 0

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答案 D

解析提示：画出积分区域图形，将该区域看成Y型区域。

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错误啦！

消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
文件: /twcms/kongphp/cache/cache_redis.class.php
位置: 第 85 行

<?php echo 'KongPHP, Road to Jane.'; ?>