小红用次数最少的对折方法验证了一条四边形丝巾的形状是正方形,她对折了( ) A. 1次 B. 2次 C. 3次 D. 4次
We will have an exam next week________the teaching plan. A.basing B.basing on C.based on D.is based on
如图所示,a、b、c三盏灯都能发光,且在电路变化时,灯不至于烧坏.试判断:当滑动变阻器的触头P向上移动时,三盏灯亮度的变化情况为( ) A.c
函数f(x)=cos(sinx)的值域是( )A.(-1,1) B.[-1,1] C.[cos1,1] D.(cos1,1]
下列实验中,不需要漂洗或冲洗的是( ) A.观察线粒体和叶绿体B.观察细胞的有丝分裂C.低温诱导染色体加倍D.观察DNA、RNA在细胞中的分布
假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处语言错误,每句中最多有两处。错误涉及一个单词的增加、
One of every four children in New Mexico and Texas lives in households that struggle to provide enough food at some point during the year, a report says. The report is the first to give a state-by-