以下四组城市中，( )组城市均是国家级历史文化名城。A．泉州、亳州、兰州 B．徐州

The mystery stories of Sir Arthur Conan Doyle are famous all over the world.

The detective in his stories is called Sherlock Holmes. He solves mysteries in a most surprising way. His assistant, Dr Watson, watches with admiration and then writes up the story of the mystery afterwards.

This is a useful story writing skill. Because Watson is not very clever, the story remains a mystery until the end. The readers can sometimes pick up some clues before he does! Then, to make Watson understand the mystery, Holmes has to explain it all, step by step. So we, the readers, get to see it step by step too. Watson is almost as good a character in the story as Sherlock Holmes!

The very first time they meet, Holmes greatly surprises Watson. When they are first introduced, Holmes says to Watson, ‘How do you do? I see you have been to Afghanistan(阿富汗).’

Watson is too amazed by this to ask Holmes how he knows this. Watson has, indeed, been to Afghanistan. Later, he asks Holmes about it. Holmes explains that there is nothing magical about what he does. He gets to know it all by very, very careful observation(观察).

Observation One

Watson was introduced to Holmes as a doctor. Yet Holmes thought that the way he stood and walked made him seem like a soldier. So, this meant he was probably an army doctor.

Observation Two

Watson's face was quite dark skinned. But his wrists were pale. So his dark face was probably sun burnt. This meant that he had been to a hot, sunny country.

Observation Three

At the time, the British army had soldiers at bases in many parts of the world. So there were still a lot of places to choose from. However, Holmes saw that Watson looked very tired and he was always holding his left arm, as if it was painful. So, he had probably been with the army to a place where they were fighting. There was only one place where the British army was fighting at that time: Afghanistan.

小题1:The writer most probably created the character, Dr Watson, to ______.

A．give Holmes help when solving mysteries

B．show Holmes' careful observation

C．help readers pick up some clues about the mystery

D．get readers to see the mystery step by step小题2: The first time they meet, ______.

A．Holmes explains how he knows Watson has been to Afghanistan

B．Holmes surprises Watson by telling that he has been to Afghanistan

C．Watson tells Holmes he has been to Afghanistan

D．Watson asks Holmes how he knows he has been to Afghanistan小题3:From the passage we know that the British army ______ at that time.

A．only had soldiers in Afghanistan

B．had many army doctors at bases in many parts of the world

C．was fighting with several countries

D．was fighting with Afghanistan

如图所示，请画出入射光线经凸透镜后的折射光线

为保证实验性研究结果的科学性和准确性，实验过程中须采用的措施是（ ）

A．教育干预

B．查阅文献

C．追查原因

D．发放问卷

E．随机分组

读“山西能源基地煤炭外运的三大主要通道图”，完成下列要求。

（1）山西煤炭通过三大通道运到港口后主要运往我国_________和_________地区。

（2）山西等省区的煤炭除了通过铁路、公路、海运等运输方式外运外，还主要通过哪种形式向外输送能

        源？这种形式有何好处？ 

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（3）山西煤炭的开发给全国和山西都带来许多积极影响，但也有消极影响。请你根据所学知识分析，山

        西煤炭的开发给山西带来哪些不利影响？ 

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氢氯噻嗪的不良反应不包括()

A.低血镁症

B.高尿酸血症

C.高血糖症

D.高脂血症

E.高血钾症