8分.35题8分.共30分)32.科研人员利用红外测量仪可以灵敏地测量一 个密闭的小室中的CO2浓度.现进行如下实验: 在密闭但可透光的两相同小室中分别放置叶面积 都是10cm2的A.B两种植物的叶片.小室的容积 均为1升.在充足的光照条件下测量CO2的浓度.测量结果记录于下表:(CO2的浓度单位:毫克/升) 记录时间(分) 0 5 10 15 20 25 30 35 40 45 A种植物叶片 150 113 83 58 50 48 48 48 48 48 B种植物叶片 150 110 75 50 35 18 8 8 8 8 根据表中记录到的数据回答下列问题: (1)从表中可以看出密闭小室中的CO2浓度变化趋势是逐渐降低.原因是 ▲. (2)从记录的结果看.当CO2浓度降低到一定水平后不再降低了.维持在这个水平上.其原因是 ▲ . (3)如果将大小.长势相似的A种植物和B种植物培养在同一个密闭的钟罩内进行实验.其他条件相同.一段时间后.生长较良好的是 ▲ 种植物. (4)假定植物光合作用的最初产物是葡萄糖.经测定:在光照下密闭容器内CO2的质量每减少44克.植物体内葡萄糖净增加30克.则实验中的B种植物叶片在25分内净增加的葡萄糖的质量为 ▲ 毫克. 查看更多

 

题目列表(包括答案和解析)

(本小题共6分,其中⑴题2分,⑵题4分)
某化学兴趣小组为了测定某种生铁样品中铁的质量分数,在实验室将5.8g生铁样品放入烧杯中,加入50g稀硫酸恰好完全反应(杂质不参加反应),反应后称得剩余物质的总质量为55.6g。请回答:
⑴你分析后一定能计算出产生氢气的质量为    。你上述计算的理论依据是          
⑵请你参与这个小组,来计算出该生铁样品中铁的质量分数是多少?(结果保留一位小数)

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(本小题共6分,其中⑴题2分,⑵题4分)
某化学兴趣小组为了测定某种生铁样品中铁的质量分数,在实验室将5.8g生铁样品放入烧杯中,加入50g稀硫酸恰好完全反应(杂质不参加反应),反应后称得剩余物质的总质量为55.6g。请回答:
⑴你分析后一定能计算出产生氢气的质量为    。你上述计算的理论依据是          
⑵请你参与这个小组,来计算出该生铁样品中铁的质量分数是多少?(结果保留一位小数)

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(本小题共6分,其中⑴题2分,⑵题4分)

某化学兴趣小组为了测定某种生铁样品中铁的质量分数,在实验室将5.8g生铁样品放入烧杯中,加入50g稀硫酸恰好完全反应(杂质不参加反应),反应后称得剩余物质的总质量为55.6g 。请回答:

⑴你分析后一定能计算出产生氢气的质量为     。你上述计算的理论依据是           

⑵请你参与这个小组,来计算出该生铁样品中铁的质量分数是多少?(结果保留一位小数)

 

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文学名著阅读(10分,每题5分)
【小题1】下列各项中对作品故事情节的叙述不正确的两项是(    )
A.黛玉进荣国府,除外祖母外,还见了二舅母王夫人,大舅母邢夫人,贾珠的妻子李纨,“凤辣子”王熙凤以及迎春、探春、惜春和衔玉而生的贾宝玉。
B.初春时节,黛玉做了一首诗《桃花行》,大家称赏不已,议定改“海棠社”为“桃花社”,林黛玉为社主,三月初五日齐集潇湘馆。
C.宝玉戴着斗笠披着蓑衣来看黛玉。黛玉笑他像个渔翁。宝玉说要弄一套给她,黛玉笑着说自己穿上就成了渔婆。言毕,她顿觉失言,羞得脸飞红,便伏在桌上嗽个不住。
D.抄检大观园,查到探春,探春命丫鬟们秉烛开门而待。但探春只允许搜查她自己的东西,丫鬟的东西不能碰。查到惜春处,竟在入画箱中搜出一些银锞子和男人的靴袜等物。惜春胆小,见了这些虽害怕,但仍袒护入画,还宣称自己早知道此事。
E.在“试文字宝玉始提亲”章节里,有人给宝玉说亲,女方是才貌双全,家境殷实,只是要女婿入赘,说亲未果。而后邢夫人向贾母建议说:“何用别处去找,一个宝玉,一个金锁的天配姻缘,老太太怎么忘了?”此建议得到贾母等人的赞同。
【小题2】《红楼梦》第一回是开篇。先后分别用“          ”、“          ”两个神话故事作楔子,为塑造贾宝玉的性格以及描写贾宝玉和林黛玉的爱情故事作铺垫,为小说染上了一层浪漫主义的色彩。(每空1分,共2分)
【小题3】请简述林黛玉第二次葬花的主要情节。(3分)
【小题4】请简述宝玉挨打的三个原因。(3分)

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完型填空(共20小题;每小题1分,满分20分)
阅读下面短文,掌握其大意,然后从四个选项(A、B、C和D)中,选出最佳选项。
"Hey, Tahlia! How's the model?"
I had just taken a bite of my hot dog __21__ I heard a familiar voice yelling at me from across the crowded school yard. I saw a group of popular girls who were all __22__.
"What kind of __23_ are you going to do? An ad for a Frankenstein movie?" More laughter. My stomach twisted into a tight knot. How could they humiliate (羞辱) me like this, __24__ the entire school? As I walked into the cafeteria, I __25__ the dark scars on my right hand.
At 9 months old, I knocked over a tea pot and dumped boiling water allover my hands and stomach. My parents __26__ me to the hospital, but I had to have skin graft (移植) operation. I was in so much pain! But what __27__ me most were the cruel things people said about how I looked, __28__ that day at lunch.
The girls were being supermean to me because they'd heard I was considering doing some modeling. A close friend had suggested that I shouldn't let my scars limit me and that I might __29__ a good model.
But after that __30__ at school, I was sure I'd made a huge mistake. Upon arriving home, I covered the mirror with a blanket, fell on my bed and sobbed.
The next day, I __31__ myself to go to school. At lunch my best friend Jesse tried to encourage me: "You can't __32_ forever, Tahlia. So what if you have a few scars? Just go outside and show them that you're just as good as they are." Although I knew he was right, I couldn’t __33__ standing up for myself like that.
However, that night as I sat on the bed, my friend's words replayed in my mind. I'm __34__ hiding from myself, I thought. How stupid! Slowly, I stood up, walked over to the __35__, and tossed the blanket aside. There, in the mirror I saw a slim, dark-haired, blue-eyed girl, looking just fine, __36__ with a few scars.
The next day I wore a comfortable T-shirt to school. What's more, I had lunch outside the cafeteria, __37__ beside those mean girls. They were shocked that I should dare to walk into their territory. I felt __38_ too—free and happy.
Sometimes people still look at me strangely. They __39_ and stare, but I don't let it get to me. I have applied to several modeling companies, and at least one company is considering me for jobs. Maybe I'll never __40_ posing on the runway, but I do know one thing: I'm done.
【小题1】
A.as B.when C.while D.before
【小题2】
A.applauding B.cheering C.laughing D.quarreling
【小题3】
A.modeling B.writing C.drilling D.acting
【小题4】
A.in spite of B.in view of C.in terms of D.in front of
【小题5】
A.looked into B.searched for C.wondered aboutD.glanced at
【小题6】
A.presented B.sent C.rushedD.handed
【小题7】
A.hurtB.beat C.disappointed D.puzzled
【小题8】
A.for B.like C.on D.after
【小题9】
A.impressB.make C.consult D.defeat
【小题10】
A.effect B.phenomenon C.challenge D.scene
【小题11】
A.forced B.expected C.reminded D.preferred
【小题12】
A.apologize B.beg C.hide D.complain
【小题13】
A.consider B.imagine C.appreciate D.resist
【小题14】
A.hardly B.ever C.even D.gradually
【小题15】
A.blanket B.bed C.chair D.mirror
【小题16】
A.while B.though C.but D.because
【小题17】
A.right B.still C.therefore D.anyhow
【小题18】
A.sensitive B.uncomfortable C.different D.tense
【小题19】
A.compare B.associate C.wave D.whisper
【小题20】
A.give up B.end up C.put up D.set up

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