比较和对照南北双方进行内战的理由。
Compare and contrast the reasons why the North and South fought the Civil War.
如果控制溶液和对照溶液没有同时比较进行，试验无效。
The test is invalid if the monitor solution is not comparable with the reference solution.
和日本人的对照比较后，显示出相反的结果。
In comparison with Japanese, the result is exactly opposite.
结果：治疗组和对照组总有效率分别为72.2%和 67.6%，组间比较无显著差异（P＞0.05）。
Results: The total effective rates were 72.2% and 67.6% in dexzopiclone and control group (P>0.05).
结果：治疗组和对照组总有效率分别为72.2%和 67.6%，组间比较无显著差异（P＞0.05）。
Results: The total effective rates were 72.2% and 67.6% in dexzopiclone and control group (P>0.05).
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