( ) came into use because it facilitates the typing today and there are not many spaces at the beginning of the lines.
举一反三
- People are beginning to use clean energy sources mainly because _______.
- Mooring lines include head lines, stern lines, spring lines and breast lines.? 正确|错误
- 中国大学MOOC: Mooring lines include head lines, stern lines, spring lines and breast lines.
- Because of many mistakes, she was made ________ these letters again. A: type B: to typing C: typed D: to type
- Polylines are much more complex than lines，construction lines and ray lines.