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[Issue Essay]

试题详情

题目:

Analytical!

选项:

答案:

提问:

For some birds the sense of smell appears to paly a role in navigation, since pigeons with surgically removed olfactory nerves ( were found to have increased difficulties ) in homing. A. were found to have increased difficulties B. have been found to have increased difficulty C. were found to have increasing difficulty D. had been found to have increased difficulties E. have been found to have increasing difficulties 答案是B,我选的A。不明白为什么要用现在完成时,而且感觉困难应该是复数。麻烦老师讲解。

解答:

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阅读242376
解答: sysadmin

提问:

【请May老师回答】这题鸡精提供的答案是D 可是我觉得第二个条件不能得出呢 假设n三次方是x平方 除以n平方 是可以得到x/ n 平方 但是x/n 不一定是整数呀?

解答:

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阅读271093
解答: 徐小梅老师

提问:

7.15/寂静:STUVW, 5个人, V和W中间必须隔一个人,求问共有几种组合? 我的想法是这样的A(3,3)*A(2,2)*C(3,1)=36种;思路如下:先把V+C(3,1)+W看成一个整体;可得:A(2,2)*C(3,1)种排法;然后5个人可分成三类,于是A(3,3)。不知道我的想法对不对,请老师解答。感激不尽!

解答:

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阅读272180
解答: 徐小梅老师

提问:

急求此题!谢谢老师!题目来7/6自寂静。x∈{1, 2, 3},y∈{4,5,6},z∈{7,8,9},求yxx与z的乘积为偶数的概率?我根据求反可得:2/3x1/3x2/3=4/27 1-4/27=23/27 不等于5/9呀?我就是卡在这里了求教。谢谢!

解答:

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阅读273242
解答: 徐小梅老师

提问:


解答:

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阅读274071
解答: ken@boost.org.cn老师

提问:

请郭老师看一下这几题 谢谢老师

解答:

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阅读273833
解答: 郭培月老师

提问:

麻烦郭老师看一下这几题,谢谢老师

解答:

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阅读273772
解答: 郭培月老师

提问:

麻烦郭老师看一下这几题,谢谢

解答:

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阅读273347
解答: 郭培月老师

提问:

请郭老师帮我看一下这几道题,好几个都完全不会…

解答:

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阅读273152
解答: 郭培月老师

提问:

请郭老师帮我看一下这几道题,好几个都完全不会…

解答:

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阅读273826
解答: 郭培月老师

提问:

不是很明白为什么A选项不对 我觉得outnumber了给其他人写信的数量可以作为这个period Emily写信的结果出现 为什么不能用现在分词呢?

解答:

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阅读270375
解答: 金栩竹老师

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