人体注射卡介苗后,经过一段时间,血液中就会出现抗结核杆菌的抗体.抗体的结构单位和细胞中合成抗体的细胞器分别是()
A. 葡萄糖、叶绿体 B. 核苷酸、核糖体
C. 氨基酸、核糖体 D. 氨基酸、高尔基体
“不识国民之原理,不通世界之大势,不知政治之本原……而仅摭拾泰西皮毛,……遂乃自足。”上述言论应当是
A.顽固派对洋务派的批评 B.维新派对洋务派的批评
C.洋务派对维新派的批评 D.洋务派对顽固派的批评
下列关于内环境的叙述,错误的是
A.血浆渗透压的大小主要取决于血浆中无机盐和蛋白质的含量
B.内环境主要由血浆、组织液和淋巴组成,血红蛋白属于内环境成分
C.内分泌腺分泌的激素释放到内环境中,然后作用于靶细胞
D.内环境中Na+不足,不利于动作电位的产生
为测定某样品中氟元素的质量分数进行如下实验,利用高氯酸(高沸点酸)将样品中的氟元素转化为氟化氢(氢氟酸为低沸点酸,含量低,不考虑对玻璃仪器的腐蚀),用水蒸气蒸出,再通过滴定测量。实验装置如下图所示,加热装置省略。
(1) 仪器C名称是___________,长导管作用是_____________________________。
(2)实验时,首先打开活塞K,待水沸腾时,关闭活塞K,开始蒸馏。若蒸馏时因反应装置局部堵塞造成长导管水位急剧上升,应立即______________________。
(3)连接水蒸气发生装置和反应装置之间的玻璃管常裹以石棉绳,其作用是________。
(4)B中加入一定体积高氯酸和1.00g 氟化稀土矿样,D中盛有滴加酚酞的NaOH溶液。加热A、B,使A中产生的水蒸气进入B。
①下列物质不可代替高氯酸的是___________(填标号)
a. 硫酸 b.硝酸 c.磷酸 d.乙酸 e.盐酸
②D中主要反应的离子方程式为_________________________________。
(5)向馏出液中加入25.00mL0.1000mol·L-1La(NO3)3溶液,得到LaF3沉淀(La3+不发生其他反应),再用0.1000 mol· L-1EDTA标准溶液滴定剩余La3+(La3+与EDTA按1︰1发生络合反应),消耗EDTA标准溶液平均19.80mL,则氟化稀土样品中氟的质量分数为______(百分数保留小数点后两位)。
2015年3月,中科院理化所与清华大学医学院联合研究小组研发出世界首个自主运动的可变形液态金属机器。该机器的问世引申出了全新的可变形机器概念,将显著提速柔性智能机器的研制进程。该机器的成功研发佐证了
①人的意识能够创造出自然界所没有的客观事物
②人能够认识事物的本质并根据自身需要加以利用
③人能够通过实践将观念中改造的对象变成现实的东西
④一定条件下人们可以突破客观规律的限制
A.①② B.①④ C.②③ D.③④
图中的圆分别表示:a﹣生产者、b﹣分解者、c﹣原核生物、d﹣蓝藻、e﹣腐生细菌.能正确表示它们之间相互关系的是( )
A. B.
C.
D.
文言文阅读
沈周,字启南,长洲人。祖澄,永乐间举人材,不就。所居曰西庄,日置酒款宾,人拟之顾仲瑛。伯父贞吉,父恒吉,并抗隐。构有竹居,兄弟读书其中。工诗善画,臧获亦解文墨。邑人陈孟贤者,陈五经继之子也。周少从之游,得其指授。年十一游南都作百韵诗上巡抚侍郎崔恭面试《凤凰台赋》援笔立就恭大嗟异。及长,书无所不览。文摹左氏,诗拟白居易、苏轼、陆游,字仿黄庭坚,并为世所爱重。尤工于画,评者谓为明世第一。
郡守欲荐周贤良,周筮《易》,得《遁》之九五,遂决意隐遁。所居有水竹亭馆之胜,图书鼎彝充牣错列,四方名士过从无虚日,风流文彩,照映一时。奉亲至孝。父殁,或劝之仕,对曰:“若不知母氏以我为命耶?奈何离膝下。”居恒厌入城市,于郭外置行窝,有事一造之。晚年,匿迹惟恐不深,先后巡抚王恕、彭礼咸礼敬之,欲留幕下,并以母老辞。
有郡守征画工绘屋壁。里人疾周者,入其姓名,遂被摄。或劝周谒贵游以免,周曰:“往役,义也,谒贵游,不更辱乎!”卒供役而还。已而守入觐,铨曹问曰:“沈先生无恙乎?”守不知所对,漫应曰:“无恙。”见内阁,李东阳曰:“沈先生有牍乎?”守益愕,复漫应曰:“有而未至。”守出,仓皇谒侍郎吴宽,问“沈先生何人?”宽备言其状。询左右,乃画壁生也。比还,谒周舍,再拜引咎,索饭,饭之而去。周以母故,终身不远游。母年九十九而终,周亦八十矣。又三年,以正德四年卒。
(节选自《明史》)
13.下列对文中画波浪线部分的断句,正确的一项是
A. 年十一/游南都/作百韵诗上/巡抚侍郎/崔恭面试《凤凰台赋》/援笔立就/恭大嗟异
B. 年十一/游南都/作百韵诗上/巡抚侍郎崔恭/面试《凤凰台赋》/援笔立就/恭大嗟异
C. 年十一/游南都/作百韵诗/上巡抚侍郎崔恭/面试《凤凰台赋》/援笔立就/恭大嗟异
D. 年十一/游南都/作百韵诗/上巡抚侍郎/崔恭面试《凤凰台赋》/援笔立就/恭大嗟异
14.下列对文中加点词语的相关内容的解说,不正确的一项是
A. 臧获,古代对奴婢的贱称。臧,男奴隶;获,古代对女婢的贱称。
B. 举,由中央向地方政府委派品行端正的人,任以官职
C. 入觐,只地方官员入朝觐见帝王。
D. 铨曹,主管选拔官员的长官。
15.下列对原文有关内容的概括和分析,不正确的一项是
A. 沈周文章模仿左丘明,诗歌效仿白居易、苏轼、陆游,书法模仿黄庭坚,一并被世人钟爱,特别擅长绘画,连他的佣人都懂得一些写作方面的学问。
B. 沈周一生厌入官场,素爱山林,欲行孝道,先后有巡抚王恕、彭礼都一以礼待他,要留他在自己的幕府中,沈周一概用母亲年迈为由辞谢了。
C. 沈周居住的地方有水竹亭馆风景优美,图书鼎彝满屋错杂排列,各地名士往来没有一天空着,风雅文采,辉映一时。
D. 文章写郡守与沈周之间的故事,主要是表现沈周在当时影响之大及其匿迹隐遁之志。
16.把文中画横线的句子翻译成现代汉语。
(1)父殁,或劝之仕,对曰:“若不知母氏以我为命耶?奈何离膝下。”
(2)比还,谒周舍,再拜引咎,索饭,饭之而去。
已知函数若关于
的方程
有7个不等实根,则实数
的取值范围是( )
.
.
.
.
以下关于群落演替的说法错误的是( )
A.演替是一个群落被另一个群落代替的过程
B.只有群落的结构受到干扰或破坏,才会出现群落的演替
C.演替过程只要不遭到人类的破坏和各种自然力的干扰,其总的趋势是物种多样性的增加
D.农田弃耕后发生的演替是次生演替
As a well-known doctor in London, John Snow was willing to help ordinary people 56
(expose) to cholera. He knew that only when 57 cause of it was found could the 58 (dead) disease be controlled. He has two theories in mind explaining how cholera killed people. 59 was that cholera multiplied in the air without reason; the other was 60 people absorbed it into their bodies 61 their meals. After many 62 (investigate), he found the drinking water was to blame because the river 63 (pollute). Immediately John Snow told the people to remove the handle from the water pump 64 that it could not be used. Soon the disease began to slow down. To prevent the disease from 65 (happen) again, the water companies were instructed not to expose people to polluted water any more. Finally "King Cholera" was defeated.
如图所示,质量为M倾角为的斜面体放在水平地面上,质量为m的物体A放在的斜面上时,恰好能匀速下滑。现用细线系住物体A,并平行于斜面向上绕过光滑的定滑轮,另一端系住质量也为m的物体B,让物体B以一定的初速度向下运动,在物体A、B运动过程中斜面体保持静止不动,下列叙述中正确的是:( )
A.物体A加速向上运动。
B.物体B处于超重状态。
C.地面对斜面体没有摩擦力作用。
D.地面对斜面体的摩擦力向左。
读我国西部内陆两地景观示意图,回答下列2题。
5.甲地以井为中心在草原上形成沙地,其原因可能是
A.由于过度开采地下水导致形成地下水漏斗区
B.由于干旱地区地下水含盐量高,使植物不能生存
C.由于风力侵蚀形成风蚀洼地
D.由于有水源,以井为中心的地区农牧业活动较多而导致地表植被破坏
6.在乙地区,可能反映该地区绿洲萎缩的现象是
A.地表反射率下降 B.土壤有机质增加,土壤紧实度下降
C.土壤盐碱度升高 D.生物生产能力提高
56. After she made helpful c on my work, I made rapid progress.
57. While I was in London, I enjoyed galleries from time to time because the paintings there a to me very much.
58. I live near to my school, so it is ______(convenience)for me to go to school on foot.
59. B yourself, or I won’t take you out to dinner.
60. There is a general (aware) that smoking is harmful.
61. The watch is beautiful but a little expensive. So she spent hours b for it.
62. The supermarket doors shut . (自动)
63. Have a diet (均衡饮食) to stay healthy.
64. Be (务实的)! We can’t afford the car and the vacation.
65. The most amazing thing about nature is its infinite v .(多样性)
66. It is beyond (argue) that Nanhai belongs to China.
67. This problem is due to the fault.(电力故障)
68. I walked out of the cinema, d (决心) I’d never come to this place.
69. I went and sat in a cafe and watched the .(过路人)
70. We are all c (担心) about her safety.
某生物种群由基因型AA、Aa、aa的个体组成,每100个个体中AA、Aa、aa分别有25个、50个、25个.该种群中A的基因频率是( )
| A. | 25% | B. | 50% | C. | 75% | D. | 100% |
如图表示两细胞间发生某种信息传递的过程.细胞Ⅰ、Ⅱ以及物质M、N的名称与图示含义相符的是( )
①胰岛A细胞、肝细胞、胰高血糖素、肝糖原;
②浆细胞、肺结核杆菌、抗体、抗原;
③甲状腺细胞、垂体细胞、甲状腺激素、受体;
④传出神经元、传人神经元、神经递质、受体.
A. ①③ B. ①④ C. ②③ D. ②④
图13是二十世纪50年代以来某国际产业转移示意图,据此回答27-29题。
27.该项工业最有可能是( )
A.电子工业 B.冶金工业 C.服装工业 D.食品工业
28.二十世纪80年代,我国受该产业转入影响最大的地区是( )
A.珠江三角洲 B.长江三角洲 C.京津唐地区 D.东北地区
29.上述地区城市化的主要推动力是( )
A.边境贸易 B.工业化 C.旅游业发展 D.矿产开发
在平面直角坐标系中,点
、
是椭圆
的左、右焦点,点
在椭圆上,过点
的直线
的方程为
.
(1) 当时,求
的面积;
(2) 若直线与
轴、
轴分别相交于
两点,试求
面积的最小值;
在制备蛇毒抗毒素血清时,须将灭毒的蛇毒液注人家兔体内,引起免疫反应.这一免疫反应和所用的蛇毒分别是()
A.特异性免疫、抗原 B. 特异性免疫、抗体
C.非特异性免疫、抗原 D. 非特异性免疫、抗体
甲、乙两车某时刻由同一地点沿同一方向开始做直线运动,若以该时刻作为
计时起点得到两车的位移—时间图象如图所示,则下列说法正确的是 ( )
A.t1时刻甲车从后面追上乙车 B.t1时刻两车相距最远
C.t1时刻两车的速度刚好相等 D.0到t1时间内,两车的平均速度相等
Long ago there was a poor farmer in Russia. He had been very 41 with everything he had. However, when he found his elder brother was 42 than him, he felt disappointed. So he 43 hard about how he could also be richer. Finally he got an idea. He started to spend less money on food and clothes to 44 some money to buy more land. Once he had enough money, he started 45 for land.
He 46 that on the neighboring land, there were some nomads (游牧民) living there. He bought some gifts and went to 47 their head. He presented the gifts to the head and told him the 48 of his visit. The head welcomed him, accepted the gifts and agreed to his 49 to get the land. The head told him that he could have the land 50 giving him anything. He can take as much land as he could 51 by walking through the land before sunset. He should start in the morning and whatever distance he could travel during the 52 , he could have it.
The farmer became very 53 when he heard this offer. Now he could have lots of 54 without paying anything. He came 55 the next morning and started running, not walking, 56 he could cover the largest area. To reach his goal, he neither ate food, nor drank water, nor had any rest. He just continued 57 . Without eating, or drinking, or resting he just got very 58 . When he came back to the head in the evening, he 59 right on the spot. Sadly his son buried him in a piece of land about 6 x 4 feet.
Don’t be greedy or you will 60 everything finally.
41. A. careful B. pleased C. bored D. busy
42. A. healthier B. stronger C. richer D. cleverer
43. A. thought B. learned C. tried D. worked
44. A. borrow B. spend C. make D. save
45. A. waiting B. looking C. preparing D. caring
46. A. explained B. hoped C. noticed D. guessed
47. A. see B. follow C. help D. cheat
48. A. chance B. result C. condition D. purpose
49. A. promise B. request C. suggestion D. order
50. A. for B. by C. without D. before
51. A. cover B. farm C. buy D. have
52. A. year B. month C. week D. day
53. A. interested B. sad C. happy D. calm
54. A. land B. crop C. experience D. knowledge
55. A. quietly B. early C. finally D. suddenly
56. A. so that B. even if C. because D. whether
57. A. dreaming B. walking C. speaking D. running
58. A. nervous B. excited C. tired D. worried
59. A. refused B. died C. appeared D. rested
60. A. defeat B. face C. change D. lose