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在数轴上,一个点从1开始,往右运动4个单位,再往左运动7个单位,这时表示的数是____
1年前
我们应该互相学习。 We should ________ ________ each other.
1年前
如图,在△ABC中,∠ACB=90°,BC的垂直平分线DE交BC于D,交AB于E,F在DE上,且AF∥CE.
1年前
After John had been in London for three years, he and his wife had a lot to tell ________.
1年前
找错改错 There is many monkeys at the zoo. ________ 改为________
1年前