[The ability of scientists to provide models of the atmosphere's complex responses to changing conditions, like seasonal and daily cycles or different planetary conjunctions, have become ever more accurate.] A The ability of scientists to provide models of the atmosphere's complex responses to changing conditions, like seasonal and daily cycles or different planetary conjunctions, have become ever more accurate. B The ability of scientists has become ever more accurate in providing models of the atmosphere's complex responses to changing conditions, such as seasonal and daily cycles or different planetary conjunctions. C Scientists have become able to provide ever more accurate models of the atmosphere's complex responses to such changing conditions as seasonal and daily cycles or different planetary conjunctions. D Scientists have become ever more accurate in their ability for providing models of the atmosphere's complex responses to changing conditions, like seasonal and daily cycles or different planetary conjunctions. E Scientists' ability to provide models of the atmosphere's complex responses to such changing conditions as seasonal and daily cycles or different planetary conjunctions have become ever more accurate.

If 500 is the mutiple of 100 that is closest to x and 400 is the multiple of 100 that is closest to y，which multiple of 100 is closest to x+y？ （1）x小于500 （2）y小于400

老师 32题不懂怎么解，都是看过答案解释还没懂的！

老师28题解答这里怎么是60的12次方，5的1次方？怎么化简化的？

老师，这道题做错了，不会，怎么解啊？谢谢！

May老师这道OG上的题没懂，即使看了下面的解释。谢谢哦！

求may老师解答

求may老师解答

求may老师解答

求may老师解答

求may老师解答