1.选择题- (共13题)
1.为了探究不同浓度的某物质(X)对肺癌细胞体外生长的作用,研究人员进行了以下实验,请完善实验思路,并回答相关问题.
材料与用具:小鼠肺癌细胞悬浮液、物质X、癌细胞培养液、生理盐水、蒸馏水、活细胞检测仪、细胞培养瓶等(说明:对动物细胞的培养过程和检测方法不做具体要求)
10.三羟基异黄酮(简称GST)是从豆科植物根部分离得到的一种天然产物,它具有显著的抗癌、抑菌、抗氧化等作用.经研究发现:GST可通过影响细胞凋亡基因(Bcl2基因和Bax基因)的表达而诱导癌细胞凋亡.请回答下列问题:
11.三羟基异黄酮(简称GST)是从豆科植物根部分离得到的一种天然产物,它具有显著的抗癌、抑菌、抗氧化等作用.经研究发现:GST可通过影响细胞凋亡基因(Bcl2基因和Bax基因)的表达而诱导癌细胞凋亡.请回答下列问题:
12.雾霾环境中的致癌因子可能通过改变正常细胞中遗传物质的结构或功能使其变为癌细胞.年老体衰的人细胞发生癌变后,癌细胞特别容易冲破细胞识别作用,逃避机体的免疫监视.请根据上述材料完成下列问题.
13.研究发现中药大黄可以抑制癌细胞的生长和增殖.研究人员为进一步研究大黄中所含的两种化学成分(大黄素和大黄酸)对小鼠艾氏腹水癌细胞的抑制作用,进行了一系列实验,实验结果如下表,请据表回答问题.
药物浓度 | 腹水癌细胞 | 肝细胞(正常组织细胞) | |||
耗氧量(μg/mL) | 抑制率(%) | 耗氧量(μg/mL) | 抑制率(%) | ||
对照 | 197.2 | / | 133.9 | / | |
大黄素 | 25 | 85.3 | 56.5 | 115.6 | 14.8 |
50 | 55.1 | 63.6 | 101.7 | 17.9 | |
75 | 49.3 | 70.6 | 99.5 | 18.1 | |
大黄酸 | 25 | 95.3 | 47.1 | 97.5 | 21.2 |
50 | 69.3 | 53.2 | 89.2 | 25.0 | |
75 | 54.3 | 59.1 | 86.7 | 28.6 |
(表中数据为5批实验结果的平均值,每批小鼠6只)
2.单项选择- (共15题)
14.
A new survey released by Yale University finds that Americans trust scientists most when ______ comes to information on climate change.
A.that | B.this | C.it | D.there |
15.
The book written by Mr. Jackson ______ people from all walks of life, making it the best seller in England.
A.appealed to | B.contributed to | C.adapted to | D.owed to |
16.
—Real Madrid is sure to win the match !
—It’ s hard to say . You know, anything ________ happen even in the last minute.
—It’ s hard to say . You know, anything ________ happen even in the last minute.
A.need | B.must |
C.should | D.can |
17.
Scientific researches show that to __________ a language one had better often get exposed to it.
A.acquire | B.access | C.acknowledge | D.assess |
18.
All the factors ________, we decided to offer the job to Li Wei, a man of rich experience.
A.considered | B.being considered |
C.considering | D.having considered |
19.
With the word “ PM2.5” _________ appearing in media reports, people pay greater attention to it and seek health tips for smoggy days.
A.constantly | B.consequently | C.permanently | D.immediately |
20.
To reduce emissions of greenhouse gases, many countries are increasing the use of natural gas, wind and other forms of _______ energy.
A.abandoned | B.original | C.alternative | D.precious |
21.
__________ our efforts to save houses dating back to the Ming Dynasty, the local government decided to pull them down to build modern buildings there.
A.In case of | B.In spite of | C.In terms of | D.In praise of |
22.
My cousin is really enthusiastic about playing basketball. ______ he shoots a ball, he likes to think of himself as a Kobe Bryant.
A.At one time | B.All the time | C.The first time | D.Every time |
23.
We can't complain that children are cheating in examinations ______ adults themselves have set such a bad role model for them to follow.
A.because | B.unless | C.when | D.though |
24.
Upon into the blue sky ______ when we passed by its nest.
A.did the bird fly | B.flew the bird | C.the bird flew | D.had the bird flown |
25.
________him that she would fail as she was so able and worked so hard.
A.It never occurred to | B.That never occurred to |
C.It never occurred with | D.That never occurred for |
26.
—These days I feel exhausted and lack strength.
—That’s _____too much drinking and poor diet lead.
—That’s _____too much drinking and poor diet lead.
A.what | B.which | C.why | D.where |
27.
—It seems that Ann doesn't like the bag you bought for her the other day.
— ________? I have been told she is desperate for one of that style.
— ________? I have been told she is desperate for one of that style.
A.If so | B.How come |
C.So what | D.What if |
试卷分析
-
【1】题量占比
选择题:(13道)
单项选择:(15道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:9
7星难题:0
8星难题:6
9星难题:0