问题
选择题
计算下列各式，其结果是4y2﹣1的是[ ]
A．（﹣2y﹣1）（﹣2y+1）
B．（2y﹣1）2
C．（4y﹣1）2
D．（2y+1）（﹣2y+1）
答案
答案：A
搜题请搜索小程序“爱下问搜题”
计算下列各式，其结果是4y2﹣1的是[ ]
A．（﹣2y﹣1）（﹣2y+1）
B．（2y﹣1）2
C．（4y﹣1）2
D．（2y+1）（﹣2y+1）
答案：A
| Read and choose. 给问句选择合适的答句，请把答句的序号写在问句前。 | |
| ( ) When do you get up? ( ) What do you do on the weekend? ( ) Thank you for telling me. ( ) Which season do you like best? ( ) Why do you like spring? ( ) What's the date today? ( ) When is your birthday?
|