A:②③
B:①②
C:①③
D:③④
完成下面问题。 “我的体能和智力比以往任何时候都有增无减……我的青春,是的,我感到我的青春才刚刚开始。我已经隐隐约约看到目标在前,虽然尚不清楚,但正在一天天地接近……啊!如果我能摆脱这种疾病,我一定能拥抱整个世界!……不,我不能忍受下去。我要扼住命运的咽喉,它永远不能使我完全屈服。啊,如果能活上上百次那就太好了!”上面语段中“我”是 ,“这种疾病”是指 。
①整体与部分相互联系,要以部分发展推动整体
②关键部分的功能及其变化在一定条件下对整体的功能起决定作用
③立足整体、统筹全局才能实现整体的最优目标
④注重系统内部结构的优化趋向,能使整体功能大于部分功能之和
分式x3y与3x2y2的最简公分母是( )
Hi, I am Susan. I am from the U. K. But now I'm studying(学习) in China. I'm going to do many things in the winter holiday. First, I'm going to finish my homework. Then I'm going to take a trip. I'm going to Beijing. It's snowy in Beijing. There is white snow everywhere. So I'm going to make a snowman. I can ski. My parents will come to China with me. We are going to fly there. We are going to have a nice trip.
根据短文内容判断正误。