题干

如图为甲、乙两种固体物质的溶解度曲线,下列说法正确的是(  )


A:t1℃时甲的溶解度大于乙的溶解度

B:t2℃时甲、乙两饱和溶液溶质的质量分数相等

C:t3℃时将ag甲完全溶于100g水中,得到甲的饱和溶液

D:将乙的溶液由t3℃降低到t2℃,乙的溶液中一定有固体析出

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答案(点此获取答案解析)

B

同类题1

阅读下文,回答问题

    下午第一节课,同学们正在上自习。忽然,一只美丽的小鸟飞了进来。

    它落在了讲台上。小鸟的身子小巧玲珑___两只眼睛圆溜溜的像两颗黑宝石___羽毛是金黄色的___光滑油亮___在太阳的照射下闪烁着点点亮光___它不时还呜叫几声___声音是那样悦耳动听___

    “快抓住它!”不知是谁喊了一声。我们班的调皮鬼蒋培军就开始了捕(pǔ  bǔ)鸟行动。只见他猫着腰,蹑手蹑脚地靠近小鸟,忽然,向前猛地一捂,却扑了空。小鸟被他吓(xià  hē)得满教室乱飞。“快把窗户关上!”蒋培军提醒了一句。“嘭!嘭!”几声,教室立刻被封得严严实实。

    同学们有的拿本子在桌子上挥舞,有的索性拿起扫帚打它……同学们追它、围它、堵它,把小鸟折腾得筋疲力尽。蒋培军趁它不注意的时候一把抓住了它。

    只见它光滑的羽毛变得乱七八糟,眼睛惊恐地望着大家,似(shì  sì)乎在说:“放了我吧!”我不忍心再看到它那可怜的样子,说:“放了它……”.不等我说完,蒋培军连忙打断我的话:“这可是我好不容易抓到的,能轻(qīn  qīng)易放走吗?”我说:“鸟儿是人类的朋友,我们要好好地保护它们,怎么能伤害它们呢?”大家一致同意我的意见。此刻,蒋培军的脸微微红了,他若有所思地点了点头。只见他打开窗户,松开手说:“飞吧,小鸟!”小鸟振了振翅膀,向着蔚蓝的天空飞去了。

    看着它远去的身影,我仿佛看到它再一次回到森林中,和它的伙伴们一起歌唱。

同类题4

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麂子

牛汉

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                                                                                                                       远远的

                                                                                                                       一只棕红色的麂子

                                                                                                                       在望不到边的

                                                                                                                       金黄的麦海里

                                                                                                                       一蹿一蹿地似飞似飘

                                                                                                                       朝这里奔跑


                                                                                                                       四面八方的人

                                                                                                                       都看见了你

                                                                                                                       用惊喜的目光

                                                                                                                       用赞叹的目光

                                                                                                                       用担忧的目光


                                                                                                                       麂子

                                                                                                                       远方来的麂子

                                                                                                                       你为什么生得这么灵巧美丽

                                                                                                                       你为什么这么天真无邪

                                                                                                                       你为什么莽撞地离开高高的山林


                                                                                                                        五六个猎人

                                                                                                                        正伏在草丛里

                                                                                                                        正伏在山丘上

                                                                                                                        枪口全对着你

                                                                                                                        哦,麂子

                                                                                                                        不要朝这里奔跑