题干

某研究性学习小组为了探究豌豆种子萌发的环境条件,他们在甲、乙、丙、丁四个培养皿中分别放置等量的棉花,每个培养皿的棉花上面都均匀放置25粒豌豆种子,然后将它们放在不同条件下进行培养,一段时间后记录种子萌发的情况如表

装置

场所

黑暗中

黑暗中

日光下

日光下

温度

23

23

23

23

棉花干湿状态

潮湿(含有一定水分)

干燥

潮湿(含有一定水分)

干燥

种子萌发的数量

23

0

24

0

请你根据上表中的情况分析作答

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同类题1

阅读文段,回答问题。

山水之歌

     我非悲天的仁者,但我爱山。我爱大山的巍峨、壮阔,也爱小山的险峻、耸峙;我爱那峰林的奇峭、砥柱的岑危、青城的神奇、剑门的天险和那半屏的如障、群峦的绵延;我爱那氤氲缥缈的晨山,也爱那风起云涌的暮山;我爱看那尺寸千里、缵簇萦纡、阴阳割昏晓的(A),也爱那云龙远岫、横岭侧峰或悠然见到的(B)。山在我生命中,是枕,是“梦回山枕隐花钿”;是砚,是“水笔山砚入案来”。不知是哪位朋友说:“你的话语,环绕着我,如同远远近近的小山。”我则要说:“远远近近的小山,环绕着我,如同喁喁的私语。”

     我爱山,以山为友,以山为灵,以山纳入我的画境,更终日向山,对语卿卿,如那“相看两不厌”的(C)。

     我非智者,但我爱水。

     我爱水的柔,柔如蓝色的秀发;我爱水的刚,刚如白色的奔马。我爱那石浅水潺潺的抒情,也爱那惊涛裂岸的壮阔;我爱那深山的冷冽、濯足的清流、浣纱的小溪,也爱那帆影的秋江、飞花的春水和惊涛的海洋。

     如果在夜晚,看明月松间、清泉石上,听苏子吟唱、渔歌互答、村妇砧杵,而浮光耀金、静影沉壁,将是何等地闲适。

     如果在黄昏,楼观沧海,石钓钱塘,看潮升汐涌、淘浪排空、孤樯危舟、乍隐乍现,而临海古朝的钟声依然,将佛陀的灵悟,送过山门,将是何其地悲壮。

     我也爱那烟冲九霄、水流千丈,把那江河拦腰截断,再顿时倾注下去的巨瀑,那是大地的震撼、川流的怒吼,使我置身其间,变得如此渺小。

     我更爱那穿云一线、悬岩坠落,范宽《豁山行旅图》中的窈远,那水如琴弦,在群峰的共鸣箱上,弹奏悠扬,清风飒飒、溪水潺潺、僧行踽踽、旅者匆匆,而半角红墙、一楼楹瓦,隔着千重树影,面对满目青山,该是多么地悠然。

     我爱水,愿以水裁衣,以云织绵,做一条弯弯的川流,在斜晖脉脉时,送千帆天际;愿以山切割,以石磋磨,做一涧高高低低的疾流,在猿啼虎啸中,将一叶轻舟,载过万重山。

同类题5

阅读理解

    Is lightning dangerous?

    Lightning is beautiful and exciting, but it kills a thousand people in the world

every year. Lightning is electricity. The electricity in lightning is very strong.In 1998, one flash of lightning killed eleven players at a football match.

    What does it feel like?

    Sabrina, aged 12 and her father are lucky to be alive. Last year, they were hit by lightning, but it did not kill them. Sabrina said afterwards, "It felt like a big hammer. My feet and legs hurt for an hour afterwards. My dad said he felt as if his hands were in an electric socket (插座).”

    How far away is it?

    When you see lightning, start counting the seconds: one...two...three....Stop

counting when you hear the thunder. Every three seconds is one kilometer. So if

you count six seconds, the lighting was two kilometers away. That does not mean

it is safe. Lightning can move very fast.

    How to be safe in a storm

    ⒈Stay inside if you can. You will be safe if you do not use the telephone,

electrical equipment or water. Do not stand too close to windows or doors.

    ⒉Lightning often hits metal things, so do not touch metal things outside. But

you are safe in a car if the windows are closed. The electricity goes down through

the car's metal and not through the people!

    ⒊Lighting often hits the tallest thing. Ask yourself "What is the tallest thing there?" If the answer is "A tree", do not stand under that tree. If the answer is "Me", move quickly!