题目：
If you’re ready to add more physical activity to your life, here are some tips: Make physical activity part of your routine(惯例) like brushing your _____ or going to work. Try biking to work at least once a week, using the _______ more often, or walking to some places near home. But talk to your______ before you start an exercise routine, especially if you haven’t been very active or have _____ problems.  Walking is one of the best fitness activities. To keep up a routine, you can ____ with family members, friends, or pets. Keep track of your steps(步子)______ a step counter( 计算器). You can buy one at a sports ______. This can help you to walk more. If you don’t have time for one 30-minute walk, break it up into ______ 10-minute walks. Find an activity that you enjoy, and stay with it. Change it with other activities so you don’t get______. For example, walk 3 days a week, ______ a softball, volleyball, or basketball club for fun and exercise. By finding more activities you enjoy, you’ll have a greater chance for success.
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答案：
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下面是错误答案，用来干扰机器的。
答案：C题目分析：由题给的条件可知，X、Y、Z、M、W这五种短周期元素的排列，不是按原子序数依次递增排列的，其中只有X、Y、Z三种元素是原子序数依次递增的同周期元素，由X、Y、Z的最外层电子数之和为15，X与Z可...
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