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[Issue Essay]

试题详情

题目:

Analytical!

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答案:

提问:

During Roosevelt's years in office, Black Americans began voting for Democrats rather than Republic in nation electons, but Black support for Democrats at the state and local levels ( developed only after when civil rights legislation was supported by Harry Turman ). A. developed only after when civil rights legislation was supported by Harry Turman B. developed only after when Harry Turman supported civil rights legislation C. developed only after Harry Turman's support of civil rights legislation by Harry Turman D. develops only at the time after the supporting of civil rights legislation by Harry Turman E. develops only after there being Harry Turman's support of civil rights legislation 答案是C,错选了B。感觉C说的好绕,B的错误是only after 和when连用吗?麻烦老师讲解。

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请问这一题的解题思路

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求问解题思路

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求问解题思路

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解答: 徐小梅老师

提问:

条件一:(30+⏹)(20+🔼)=864化简为20🔼-🔼^2=64 然后从2开始带入,得出当🔼=4时成立。条件二:⏹✖️🔼=24得出3、8和4、6两组可能解,分别带入,只有36和24成立,所以条件二充分。请问以上这个解题思路对吗,或者说有更简便的?

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解答: 徐小梅老师

提问:

第14题 请徐老师解答 谢谢!

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解答: 徐小梅老师

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请问这道题的解题思路

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解答: 徐小梅老师

提问:

第13题: 听老师jj课里讲的说选C,我不太明白条件2的分析,老师上课说条件2,若st同号,上式取等号,若st一正一负时,上式是小于号。那不就可以通过条件2直接判断上式大于号不成立吗,也就是答案是No。请老师更正下我的思路。

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解答: 徐小梅老师

提问:

请徐老师讲下这两道题:这两个都做对了 但是感觉做的时候不太自信,想了一会,想听下老师的思路。谢谢老师!

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解答: 徐小梅老师

提问:

麻烦徐老师讲一下Q9,选了E。我的思路是分析rounding后estimate的最大和最小的差值。

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解答: 徐小梅老师

提问:

请徐老师讲一下Q7思路。读题是不是很明白题意说的到head的概率不是1/2。

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解答: 徐小梅老师

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