问题
填空题
如果方程ax2+2x+1=0有两个不等实根,则实数a的取值范围是( )
答案
a<1且a≠0
如果方程ax2+2x+1=0有两个不等实根,则实数a的取值范围是( )
a<1且a≠0
根据句子意思,选用方框中的词填空。 | |
2. What's the ____________ of Xuzhou, do you know? 3. I can ____________ what the place is going to look like in a few years' time. 4. The journey took a long time. There was a lot of ____________. 5. We shouldn't just talk about it. Let's do something ____________. |