. X is a positive integer and the sum of all the units digit is 170 , Y is a integer, and X=10^20-Y, then what might be the value of Y? 请教一下,“ ^ ”这个符号是什么意思啊
6. in a survey of the number of goose, scientists harvest A (数字忘记了)个 eggs and select 2 eggs out of 90% nests have more than 5 eggs, and there are B nests that have 4 eggs. There are no other nests. So what is the total number of nests surveyed ? let me try no.6 more clearly, this one tests understanding of the whole sentence, in a survey of the nests of goose, scientists harvest A eggs in a way that they select 2 eggs out of 90% of nests that have more than 5 eggs. and there are B nests that have 4 eggs.
恐龙体积大的原因。第一段说恐龙体积大的原因可能是什么什么,然后作者说whatever the reason(这里出了一题,问作者提到whatever the reason 目的是为了?我选小结开头的引句转移至另一个topic),大体积恐龙的出现必须有三个前题:a冷血、b. range大、c. 没有competitor for foods or compete with each other。最后一段说古时候好像是非洲还是美洲的海岸的海水下沉导致一整块大陆连在一起,是使得那个时期广泛存在大体积动物的原因
. X is a positive integer and the sum of all the units digit is 170 , Y is a integer, and X=10^20-Y, then what might be the value of Y? 请教一下,“ ^ ”这个符号是什么意思啊