作业帮英语厉害的人请进~一定要正确!
来源：学生作业帮 编辑：拍题作业网作业帮 分类：英语作业 时间：2024/06/03 00:18:05
英语厉害的人请进~一定要正确!
将下列的句子改成疑问句和否定句~
(1)In ancient times,people wrote numbers in many different ways.
(2)They then invented the zero.
(3)One of the first calculating machines was an abacus.
(4)Abacuses are fast and accurate,so people still use them today.
(5)It can also calculate percentages and square roots.
将下列的句子改成疑问句和否定句~
(1)In ancient times,people wrote numbers in many different ways.
(2)They then invented the zero.
(3)One of the first calculating machines was an abacus.
(4)Abacuses are fast and accurate,so people still use them today.
(5)It can also calculate percentages and square roots.
(1)In ancient times,people didn't write numbers in many different ways.
Did people write numbers in many different ways in ancient times?
(2)They then didn't invent the zero.
Did they then invent the zero?
(3)One of the first calculating machines wasn't an abacus.
Was one of the first calculating machines an abacus?
(4)Abacuses aren't fast and accurate,so people still don't use them today.
(5)It can't also calculate percentages and square roots.
Can it also calculate percentages and square roots?
Did people write numbers in many different ways in ancient times?
(2)They then didn't invent the zero.
Did they then invent the zero?
(3)One of the first calculating machines wasn't an abacus.
Was one of the first calculating machines an abacus?
(4)Abacuses aren't fast and accurate,so people still don't use them today.
(5)It can't also calculate percentages and square roots.
Can it also calculate percentages and square roots?
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