施工招标文件的内容一般不包括( )。A．工程量清单 B．资格预审条件 C．合同条件

History, as we know, is filled with facts, with places, names, dates, and events.

History is also filled with feelings, with pain, joy, excitement, and fear.

Facts are set down in books, but what happens to feelings? How can you take the pain, for example, and write it into a history book? You can’t. But you can put it to music. Take the blues for example.

The blues started when black musicians in the South began to sing about their hard times, those times which made them feel blue. The early blues was the beginning of other musical styles, from jazz to rock and roll.

Music, you might say, is a record of feelings.

Of course, facts are important: the civil rights movement, the race for space, the Vietnam War. But the feelings behind these events – the pride of being black, the excitement of a rocket blast (点火起飞), the pain of a war – are also an important part of history.

小题1:In the passage, the word “blue” and the word “blues” are related to __________.

A．a feeling and a kind of music

B．a color

C．a kind of music and a person

D．people and their feelings小题2:According to the writer’s idea, what can make people feel blue?

A．A history book

B．Music.

C．History.

D．Hard times.小题3:Besides the above, the writer also explains ___________.

A．what caused the Vietnam War

B．the feelings behind some important events

C．the relation between history and music

D．why he wrote the article

科学家预言：未来最理想的燃料是乙醇。将绿色植物的秸杆(主要成分是纤维素，化学式为(C₆H₁₀O₅)。在适当催化剂的作用下与水发生反应生成葡萄糖C₆H₁₂O₆。再将葡萄糖在一定条件下(有催化剂存在)发酵转化成乙醇C₂H₅OH和CO₂。乙醇可用作燃料，在氧气中燃烧生成水和二氧化碳并放出热量。试写出第二、三步转化的化学方程式。

(1)                                                ； (2)                                             。

在分馏塔中吹入水蒸汽为什么会降低油气分压？

静脉输液法的评估

患者，女，30岁，左上中切牙冠横折3年，切端缺损约1／4，断面不敏感，热测有正常反应，牙齿无叩痛，无松动，牙齿色泽无改变，X线片示左上中切牙根尖无阴影，牙周膜间隙无明显改变。

以下治疗方案最适合的是（）

A.树脂充填

B.桩核+全冠

C.3/4冠

D.嵌体

E.金属烤瓷冠