勾股定理神秘而美妙,它的证法多样,其巧妙各有不同,其中的“面积法”给了小聪以灵感。他惊喜地发现:当两个全等的直角三角形如图1或图2摆放时
100件产品中,含有合格品95件,次品5件,某人从中任意抽取一件产品,则正好抽到次品的概率是
(2011年湖南怀化,9题)下列灭火方法中,不正确的是A、油锅着火用锅盖该灭 B、木材着火用水浇灭C、电器着火用水扑灭 D、实验桌上洒出的酒精着
二、阅读理解 阅读下列短文,从每题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。 Not many years ago, a wealthy and rather
---I’m sorry to keep you waiting. I’ll make short work of this. --- _________. I’m not in a hurry. A. Take it easy B. Take your time C. Not at all.
---Where did you come across your old classmate Jane? ---It was in the supermarket _________ she worked _________ I came across her. A.where; when B.that; when
下列词语中加点的字,读音全都正确的一组是 ( ) A.旖旎(yǐ nǐ) 潜水艇(qiǎn) 烜赫一时(xuān) 靡不有初,鲜克有终(mǐ) B.框架(kuàng)