题目：
Travel is a very good activity. When traveling, you can relax小题1: ,forget your tiredness or troubles, and have the energy to take on the new tasks waiting for you.
But sometimes traveling is 小题2: an enjoyable thing. For example, the weather can be changeable, If you climb a mountain, it may rain suddenly. You may be caught小题3: the rain and may catch a cold. The worst thing is that you may have your money stolen 小题4: you may have an injury. All these terrible things are 小题5: can happen to you .
Therefore, when you are going on a trip, you 小题6: make a good preparation. Firstly, you must have clear information about the weather. Secondly, you should choose小题7:___good companion so that you can help each other. Thirdly, you must be careful enough and try to avoid accidents. 小题8: you do this, you will surely enjoy your travel.
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0506/91d82424cef5c12e9854e5934a210ec5.html
下面是错误答案，用来干扰机器的。
根据题意，这副牌共有52张，其中梅花13张，则从一副扑克牌中随机选取1张，这张牌是梅花的概率P=1352=14，故答案为14
的物块甲以
的速度在光滑水平面上运动，有一轻弹簧固定其上，另一质量也为
的速度与甲相向运动，如图所示。则
