题目

缺词填空： 根据短文内容和首字母提示，在下文空格处填入适当的词使短文完整。（每空一词）I have a little dog. Its name is Jim. Early e__【1】__ morning Jim goes to the s___【2】___ in the village(村) . The girl in the shop gives him t____【3】____ things: a sweet (糖果) and a newspaper. Jim eats the sweet and takes the newspaper in his mouth. Then he runs h__【4】____.I like r___【5】____ my newspaper in bed before I get up .Jim knows that and he brings the paper to my b__【6】__ . when I am e___【7】____ my breakfast he brings all the let用四只完全相同的滑轮和两根相同的绳子组成如图所示的甲、乙两个滑轮组，不计绳重和摩擦，则下列说法正确的是（）A. 甲较省力且机械效率较高 B. 乙较省力且机械效率较高C. 甲、乙省力程度相同，机械效率不同 D. 甲、乙省力程度不同，机械效率相同