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阅读下面短文，根据所给情节进行续写，使之构成一个完整的故事。

On market days when the farmers around Darrowby brought their goods to the little town to sell, I used to take a walk across the square to meet the farmers who gathered there to chat. One of the farmers was telling me about his sick cow when he saw a little dog among the market stalls (货摊). The thing that made us notice the dog was that he was sitting up, paws dangling (悬垂), head pointing expectantly, begging, in front of the stall selling cakes and biscuits.

“Look at that little fellow,” the farmer said. “I wonder where he’s from.”

As he spoke, the stallholder threw the dog some bread which the animal ate eagerly, but when the man came round and stretched out a hand the little thing ran away.

I was standing there, trying to see where he had gone, when a young policeman came up to me.

“I’ve been watching that dog begging among the stalls all morning,” he said, “but I haven’t been able to get near him.”

“Yes, it’s strange. You can see he’s friendly, but he’s also afraid. I wonder who owns him.”

“I think he’s a stray (无主的宠物), Mr. Herriot. I know just about all the dogs around here. But this one is a stranger to me.”

I nodded. “I’m sure you’re right. Anything could have happened to him. He could have been ill-treated by somebody and run away, or he could have been dumped from a car.”

“Yes,” the policeman replied, “I don’t know how anybody can leave a helpless animal to fend for (照料) itself like that. I’ve had a few tries at catching him, but it’s no good.”

A week passed before I met the policeman again in the market.

“Have you caught the dog, sir?” I asked.

The policeman looked very serious. “Yes,” he replied, “I’m afraid he’s been arrested.”

“Arrested?” I said in astonishment. “What do you mean?”

“Well,” he said, “it seems that it’s against the law for a dog to go begging in the market square.”

“I still don’t know what this is all about,” I said. “Where is he now?”

“I’ll take you to him,” the policeman replied.

注意:
1.续写词数应为150左右；
2.请按如下格式在答题卡的相应位置作答。

We walked a short way along the road to a pretty cottage.

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

A wave of relief swept over me.

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

一个士兵坐在皮划艇上，他连同装备和皮划艇的总质量是M=120kg，这个士兵用自动步枪在t=2s内沿水平方向连续射出20发子弹，每发子弹的质量是m=10g，子弹离开枪口时相对步枪的速度是v₀=800m/s，射击前皮划艇是静止的，不考虑水的阻力。则以下说法正确的是（　　）

A．每次射击后皮划艇的速度改变量都相同

B．每次射击后皮划艇的速度改变量都不同，若射出第n发，则

C．连续射击20发后皮划艇的速度是0.67m/s

D．连续射击时枪受到的平均反冲作用力是40N

线粒体DNA（mtDNA）的转录调控对维持线粒体的正常功能至关重要。mtDNA的2条链分别称为重链和轻链。
(1)mtDNA的转录过程与核DNA相似，在______酶的作用下，游离的______依次连接，合成mRNA．
(2)环境变化信号会诱导7SRNA在线粒体中积累，科研人员推测7SRNA可以调控mtDNA轻链转录，并以mtDNA轻链为模板构建体外转录体系来进行实验验证。
①科研人员设置了2组实验，其中A组加入不同浓度的7SRNA，B组加入不同浓度的无关RNA作为____；
②检测体系中mtDNA轻链转录的mRNA生成量，据图1可知，7SRNA______（填“促进”、“抑制”或“不影响”）mtDNA的转录。
   
(3)图2所示为mtDNA轻链的转录起始复合物，由酶POLRMT、转录因子（TFAM和TFB2M）和mtDNA轻链启动子组成。7SRNA可以与转录起始复合物中某种成分结合，诱导其空间结构改变进而影响转录。为确定7SRNA结合的具体成分，科学家进行体外转录实验，检测mtDNA轻链mRNA的生成情况，结果见下表。

实验处理	不用7SRNA处理	用7SRNA处理	用7SRNA处理
			一段时间后加入POLRMT	一段时间后加入TFAM	一段时间后加入TFB2M	一段时间后加入mtDNA
mtDNA轻链mRNA 的生成情况	+	-	+	-	-	-

注：+代表有mtDNA轻链mRNA；-代表无mtDNA轻链mRNA
根据表中结果7SRNA结合的成分应为____，判断的依据是____。该成分在与7SRNA结合时，会聚合形成二聚体。
(4)继续研究发现高浓度的7SRNA会诱导线粒体中mtEXO（RNA降解酶复合体）的形成，从而形成一个完整的mtDNA转录调控系统，维持线粒体基因表达的动态平衡过程。综合题中信息，请完成下图示，阐明mtDNA轻链转录的调控机制______。
   
注：补全图中2处横线和2处方框中的内容

如图所示，光滑的水平轨道与光滑的圆弧轨道在点平滑连接，，圆弧轨道半径。质量的小物块（可视为质点）静止在水平轨道上的点，现给小物块一个水平向右的瞬时冲量，则小物块从离开点到返回点所经历的时间约为（　　）
   

A．

B．

C．

D．

When I was in high school, the last person I wanted to be with was the foreign teacher. On one hand, I was unable to _______ what she said, so I did not know what responses I should give. On the other hand, I had no faith in the _______ of my English. To avoid making mistakes, I wrote down every word I intended to say and _______ all the words whose pronunciation I had not been sure of before _______ my hand to answer her question. In most of he cases, hardly had I made proper preparations when she brought another subject. _______ to express myself clearly led to a_______ sense of inferiority (低等).

_______, communication with a foreigner who came to visit my father in the last Spring Festival built my _______. Because of the comfortable and delightful atmosphere, I found it unnecessary to speak English totally _______ on grammar rules. I paid little attention to the grammar and even used gestures, pictures and objects to make myself easily ________. During the conversation, he frequently nodded to show his understanding of what I said, ________ encouraged me to express myself more ________. This experience made me ________ that the attraction of language is not only in some ________ literary works but also in the understanding between two common people with ________ mother tongues.

It is possible for native speakers to make some ________ in communication, let alone people who learn English as a foreign language. Besides a good ________ of vocabulary and grammar, there are more other actors for effective (有效的) communication ________ facial expressions and gestures. With this belief, I became more willing to ________ with foreigners and more communication further ________ my English. In this cycle, I gained the most precious fortune (财富) — confidence.

1．

A．catch

B．focus

C．recognize

D．record

2．

A．fluency

B．correctness

C．meaning

D．structure

3．

A．looked out

B．turned up

C．looked up

D．turned out

4．

A．throwing

B．cleaning

C．washing

D．raising

5．

A．Ability

B．Failure

C．Entrance

D．Objection

6．

A．total

B．strange

C．common

D．proper

7．

A．Besides

B．However

C．Therefore

D．Moreover

8．

A．self-doubt

B．interest

C．self-confidence

D．pride

9．

A．decided

B．depended

C．worked

D．based

10．

A．understood

B．heard

C．known

D．puzzled

11．

A．in charge

B．in turn

C．in return

D．in need

12．

A．loudly

B．frequently

C．freely

D．slowly

13．

A．admit

B．express

C．realize

D．believe

14．

A．serious

B．modern

C．fresh

D．famous

15．

A．lovely

B．strange

C．different

D．popular

16．

A．comments

B．mistakes

C．experiments

D．studies

17．

A．command

B．variety

C．number

D．thought

18．

A．such as

B．as to

C．but for

D．far from

19．

A．agree

B．travel

C．argue

D．communicate

20．

A．increased

B．enriched

C．widened

D．improved

If you don't want to get ________ for your carelessness by your teacher, then you should try to be more attentive and cooperative in class.

A．told apart

B．told against

C．told on

D．told off

氨是最重要的化学品之一，我国目前氨的生产能力位居世界首位。回答下列问题：
(1)根据下图数据计算反应________。

(2)合成氨工厂以“水煤气”和为原料，采用两段间接换热式绝热反应器，由进气口充入一定量含CO、、、的混合气体，在反应器A进行合成氨，其催化剂Ⅲ铁触媒，在500℃活性最大，反应器B中主要发生的反应为，装置如图。

①温度比较：气流a_______气流b(填“>”“<”或“=”)。
②气体流速一定，经由催化剂Ⅰ到催化剂Ⅱ，原料转化率有提升，其可能原因是：_______。
③下列说法正确的是_______。
A．合成氨是目前自然固氮最重要的途径
B．利用焦炭与水蒸气高温制备水煤气时，适当加快通入水蒸气流速，有利于水煤气生成
C．体系温度升高，可能导致催化剂失活，用热交换器将原料气可预热并使反应体系冷却
D．终端出口2得到的气体，通过液化可分离出
(3)LiH-3d过渡金属复合催化剂也可用于催化合成氨，已知先被吸附发生反应，紧接着被吸附发生的反应方程式___________。
(4)工业上常用甲烷水蒸气重整制备所得的氢气用于合成氨的原料，体系中发生如下反应。
Ⅰ．
Ⅱ．
恒温恒压条件下，1mol (g)和1mol (g)反应达平衡时，(g)的转化率为m，(g)的物质的量为n mol，则反应Ⅰ的平衡常数___________(写出含有m、n的计算式；对于反应，，x为物质的量分数)。

利用平衡移动原理，分析一定温度下在不同pH的体系中的可能产物。
已知：
ⅰ．下图中曲线表示体系中各含碳粒子的物质的量分数与pH的关系。

ⅱ．下图中曲线Ⅰ的离子浓度关系符合；曲线Ⅱ的离子浓度关系符合[注：起始，不同pH下由上图得到]。

下列说法正确的是

A．由第1个图，pH=9时，

B．由第2个图，初始状态pH=9、，平衡后溶液中存在：

C．由第2个图，初始状态pH=11、，有沉淀生成

D．由两个图分析，初始状态pH=8、，发生反应：

如图所示，实验室中利用洁净的铜片(0.3 mol)和浓硫酸进行反应，实验中无气体生成，Y型管左侧得到Cu₂S和白色固体a，倾斜Y型管使左侧的物质全部转移到右侧稀硝酸中，反应生成固体单质b、a的溶液和NO。下列说法错误的是
       

A．白色固体为CuSO4

B．NO为还原产物，b为氧化产物

C．NO与b的物质的量之和可能为0.2 mol

D．参加反应的浓硫酸中，表现氧化性的占25%

某NaAlO₂、Na₂CO₃的混合溶液中逐滴加入 1mol·L^-1的盐酸，测得溶液中的CO₃^2-、HCO₃^-、AlO₂^-、Al³⁺的物质的量与加入盐酸溶液的体积变化关系如图所示。（已知：H₂CO₃的电离平衡常数K₁=4.3×10^-7,K₂=5.6×10^-11；Al(OH)₃的酸式电离平衡常数K=6.3×10^-13）则下列说法正确的是

A．V1:V2=1:4

B．M点时生成的CO2为0.05mol

C．原混合溶液中的CO32-与AlO2-的物质的量之比为1:3

D．a曲线表示的离子方程式为：AlO2-+4H+=Al3++2H2O