举一反三
- 对正态总体均值进行区间估计时，其它条件不变，置信水平越小，则置信上限与置信下限...948167a6d8407560.png
- 对正态总体均值进行区间估计时,其它条件不变,置信水平越小,则置信上限与置信下限的差https://p.ananas.chaoxing.com/star3/origin/a53f47223f1ccb563610e39a2365bdee.png
- 第四题（1）置信下限是 ；（2）置信上限是 。
- 第二题：置信下限是 ；置信上限是： 。
- 下列哪味中药为桂枝 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/1ecec46f5cb24d1fba6eda07816fff21.JPG"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/6630610aa0cf4408832ccd382a3263e2.JPG"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/862f3e2a8fb7477cba0e4142b90606da.JPG"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/fb77e5e5386c43739e4ef959765e0dcd.jpg">
内容
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下列哪味中药为柴胡 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/52f519e3210144ab87fef57fa951264a.jpg"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/67ed1a0a3783414782a019ae69ea0581.jpg"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/661692aff17840c4a892da13f70a78e8.jpg"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/3f64d19bea8741acb95f5a5b1a9dc3ae.jpg">
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下列哪味中药为薄荷 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/ae69de68d087475e823f581068ff4f77.jpg"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/2d39f4d4bb8847e1b6a60941b31c77ae.jpg"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/42e273e3124546be90b3c33b518c82c5.jpg"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/1973b7c80e2943188e3d38338d0d309d.jpg">
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下列哪味中药为桑叶 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/c0e0ae23be6d47b6b27f5e1b4d8888ac.jpg"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/97a0e9f9cb314206a0d958c82cdc84df.jpg"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/ebb0a4cd94a14170a78bfcad353e09c1.jpg"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/053bbb87a23c4bc18406f94418b083f6.jpg">
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下列碳正离子的稳定性最大的是（ ） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/5ae2658f66544b629fdcabed52d5f957.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/1cefba39460048ef898157ea2ebc28b4.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/451893995c5e4c8f8109398975819582.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/31d934d857664b5c8e554a3b9c0fde75.png">
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在绘制程序流程图时，下面哪个表示“选择结构”【 】 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/f690d214ae1a4af7b5efcdb4b898f2ac.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/d5525f58c3264ce69be6c8a899f5e49c.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/f058e79b5ce846e1a57975ef8d0a9ac8.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/6aa136bdf7f8499fa1bccb119e6db668.png">