已知是边长为4的等边三角形，P为平面内一点，则的最 小值为 ．
He's ________drink and never does a stroke of work. A. gone to B. taken to C. taken up D. gone for
---Have you watched the live Oscar Award presentation? ---I ___________it online later because of an important date. A．watched B．had watched C．was watching D
澳大利亚的人口和城市主要集中在A．东南部沿海B．西南部沿海C．东北部沿海D．西北部沿海
“I didn’t doanything!” “Say you’re sorry!” “It’snot my fault!” Sound familiar? If so, you are like alot of kids who sometimes __1__ with their friends or family members.It
现有a、b、c三种金属，a、b分别与稀硫酸、c的硝酸盐溶液作用的现象如表所示： 金属ab 与稀硫酸作用无反应溶解并放出气体 与c的硝酸盐溶液作用表
A group of homeless children in the Indian capital of New Delhi publish a newspaper telling about their own lives. It is called Balaknama, which means “children’s voice”. The newspaper is
如图，将一张长为1、宽为的长方形纸片（）折一下，剪下一个边长等于宽度的正方形（称为第一次操作）；再将剩下的长方形如图折一下，再次剪下一
