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(1)若图甲是癌细胞的细胞膜,则膜上含量较正常细胞减少的物质是[ ] 。
(2)若图甲是线粒体膜,b和c过程运输的气体分别是 。b、c运输方式符合图 所表示的物质运输曲线。
(3)若图甲表示人体红细胞膜,则表示Na+、K+运输的分别是图中 。Na+、K+的运输方式符合图 所示曲线。
(4)已知红细胞吸收葡萄糖是协助扩散,而有人认为小肠上皮细胞以主动运输的方式吸收葡萄糖,请设计实验加以确定。
①实验步骤:
第一步:取甲、乙两组生理状况相同的小肠上皮细胞,放入适宜浓度的含有葡萄糖的培养液中。
第二步:甲组细胞给予正常的呼吸条件, 。
第三步: 。
②预测实验结果并分析:
a.若甲、乙两组细胞对葡萄糖的吸收速率基本相同,则 。
b. 。 查看习题详情和答案>>
(1)A代表 分子,B代表 ,D代表 ;
(2)动物细胞吸水膨胀时B的厚度变小,说明B具有 。
(3)维生素D和葡萄糖从肠腔进入小肠上皮细胞的过程分别是图中编号 。
(4)若图甲是癌细胞的细胞膜,则膜上含量较正常细胞减小的物质是[ ] 。
(5)若图中是线粒体膜,b和c过程运输的气体分别是 。b、c运输方式符号图 所表示的物质运输曲线。
(6)若图甲表示人体红细胞膜,则表示Na+、K+运输的分别是图中 。Na+、K+的运输方式符合图中 所示曲线。
(7)已知红细胞吸收葡萄糖是协助扩散,而有人认为小肠上皮细胞以主动运输的方式吸收葡萄糖,请设计实验加以确定。
①实验步骤:
第一步:取甲、乙两组生长状况相同的小肠上皮细胞,放入适宜浓度的含有葡萄糖的培养液中。
第二步:甲组细胞给予正常的呼吸条件, 。
第三步: 。
②预测实验结果并分析:
a.若甲、乙两组细胞对葡萄糖的吸收速率基本相同,则 。
b. 。 查看习题详情和答案>>
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听力测试
(一)听句子,选择与句子内容相对应的图片。每个句子读两遍。
请看第一组的四幅图片,听三个句子,完成第1至第3小题。
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1.________
2.________
3.________
请看第二组的四幅图片,听三个句子,完成第4至第6小题。
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4.________
5.________
6.________
(二)听对话和问题,根据所听内容,选择最佳答案。对话和问题都读两遍。
7.A.Black.
B.Blue.
C.Brown.
D.Red.
8.A.Monkeys and tigers.
B.Lions and tigers.
C.Lions and elephants.
D.Monkeys and elephants.
9.A.Rosa's.
B.Tim
's.C.Cindy
's.D.Alice
's.10.A.By four o'clock.
B.By five o'clock.
C.By six o'clock.
D.By seven o'clock.
11.A.In a park.
B.In a zoo.
C.At school.
D.At home.
12.A.An English teacher.
B.A policewoman.
C.A bank clerk.
D.An engineer.
13.A.Every week.
B.Three times a month.
C.Twice a month.
D.Once a month.
14.A.She has to babysit her sister.
B.She has to go to the doctor.
C.She has too much homework.
D.She has a piano lesson.
(三)听短文,根据短文内容,判断下列句子正误,正确的用“A”表示,不正确的用“B”表示。短文读两遍。听短文前,你们有20秒钟的时间阅读下列句子。
15.Mr Smith likes collecting clocks.
16.Mr Smith has two hundred clocks.
17.Mrs Smith likes collecting clocks, too.
18.Mrs Smith has to clean all the clocks every day.
19.The sound of these clocks annoys Mrs Smith every day.
20.They always know the real time because they have so many clocks.
(四)听写。听对话,根据对话内容,完成下面的表格,每空词数不限。对话读三遍。听对话前,你们有15秒钟的时间阅读表格内容。(共5小题,计5分)
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听力选择(共15小题,计15分;第小题约有8秒钟的答题时间)
(一)录音中有五个句子,每个句子听一遍,然后从每小题A、B、C中选出能对每个句子做出适当反应的答语。
1.A.Yes, lovely.
B.Don't worry.
C.I hope so.
2.A.I agree.
B.See you soon.
C.You are welcome.
3.A.No, thank you.
B.Well done.
C.you'd better not.
4.A.Don't mention it.
B.I will.
C.That's a good idea.
5.A.
B.
C.
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(二)录音中有五组对话,听对话两遍后,从每小题A、B、C中选出能回答所给问题的正确答案。
6.How is Linda?
A.Pretty.
B.Well.
C.Ill.
7.What's the weather like here?
A.Dry in summer.
B.Wet in summer.
C.Wet in autumn.
8.How is Lily going home?
A.By car.
B.By plane.
C.By train.
9.When will the man meet the woman's parents?
A.Tomorrow.
B.Next Sunday.
C.This weekend.
10.Who is the present for?
A.Mrs.Zhang.
B.Tom.
C.Wu Jian.
(三)录音中有一段对话,听对话两遍后,从每小题A、B、C中选出能回答所给问题的正确答案。
11.What is Martin doing in Boston?
A.He is writing a story.
B.He is painting the house.
C.He is playing baseball.
12.Who is painting outside?
A.Martin.
B.Martin's mother.
C.Martin's father.
13.Why didn't Martin's parents go to the cinema?
A.They didn't like the film.
B.They thought it was too expensive.
C.They went shopping.
14.Where were his parents when Martin phoned on Saturday?
A.In the garden.
B.In the shop.
C.In the cinema.
15.When will Martin call his father again?
A.On Saturday.
B.This evening.
C.Next weekend.
(四)听力填表共5小题,计5分
录音中是一篇关于如何调整易怒情绪的短文,听两遍后,根据所听内容完成下面的表格。