问题
判断题
滑轮按其运动的方式可分为定滑轮和动滑轮两类。
答案
参考答案：对
搜题请搜索小程序“爱下问搜题”
滑轮按其运动的方式可分为定滑轮和动滑轮两类。
参考答案：对
I can’t remember when I started collecting litter. But it was when I got tired of seeing litter nearby and ___1___ that no one else was going to pick it up. I live near a forest in Ohio, America. I can walk there ___2___ three minutes. I used to love going there to play with my dog. But one day there was ___3___ much litter there that I became very unhappy. I decided I had to clean up the forest. I wanted to feel happy ___4___ there again. I __5___ my first trip to clean the forest that afternoon. I took a big black rubbish bag with me. Ten minutes after starting to pick up litter, my bag was ___6__! It had cans, bottles, broken glasses and newspapers in it. From then on, I went to the forest four times a year to pick up litter. I’m often there for three hours. It makes me feel ___7___ to do something for the environment. After each trip, I look at all the litter that I’ve found. If ___8___ of it is recyclable(可回收的) , I keep it. I can’t understand ___9___ people drop litter. But I will keep picking it up until they stop dropping it. I know I am only doing a small bit to ___10___ the earth, but I still think it is important.
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