《同步训练·英语》六年级（上册）听读拓展材料Passage One：The following discussion took place between a father and his nine-year-old son. “It’s unfair, Dad. Mum wants me to make my bed, but I don’t know how.” “Itspring是什么意思啊...

六年级下册英语第二单元作文道歉回信全文共3篇示例，供读者参考6年级英语作文篇1    page from sally’s diary    last week we had the school sports meet on our school sports ground. all my classmates took active parts in it...

二进制，十六进制，十进制，八进制 1．二进制转十进制，  111    第一位的1 他就是一个1 不用管他， 好，上一位， 这  位的1就要乘2了，因为是二进制，除了个位数，上位的都是乘着2上去的。  那就是 1+1*2+1*2*2=7    好比十进制的 523  ，个位3不管，2这一位就要乘以10了（后几位就...