( Monitoring heart patients' exercise as well as athletes excersing, is now done by small transmitters broadcasting physiological measurements to nearby recording machines. ) A. Monitoring heart patients' exercise as well as athletes excersing, is now done by small transmitters broadcasting physiological measurements to nearby recording machines. B. Monitoring the exercise of heart patients, as well as athletes excersing, is now done by small transmitters broadcasting physiological measurements to nearby recording machines. C. Small transmitters broadcasting physiological measurement to nearby recording machines are now used to monitor the exercise of both heart patients and athletes. D. Broadcasting physiological measurements to nearby recording machines, small transmitters are now used to monitor heart patients' exercise, as well as athletes exercising. E. Both athletes exercising and heart patients' exercise are now monitored by small transmitters broadcasting physiological measurements to nearby recording machines. 答案是C，错选了E。排除C的原因是感觉主语很长，头重脚轻。第一遍看原文的时候感觉exercise和exercising不平行，但是每个选项读下来发现都是这个形式，（当时没有注意到C的形式）于是就认为这个可能不是考点。E的错误是exercise和exercising吗？麻烦老师讲解。

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