小儿结核病的特点是（）。 A.全身症状轻微 B.局部组织损伤重 C.易发生血行播散

颅内压增高的主要临床表现为（）

A.剧烈头痛、头晕

B.视力减退、外展神经麻痹

C.神志改变、血压升高

D.头痛、头晕及视神经 * * 水肿

E.头痛、头晕、精神障碍

下图表示一项重要的生物技术，对图中物质a、b、c、d的描述，正确的是

A．a通常存在于细菌体内，目前尚未发现真核生物体内有类似的结构

B．b识别特定的核苷酸序列，并将A与T之间的氢键切开

C．c连接双链间的A和T，使黏性末端处碱基互补配对

D．若要获得e，则一般需要用限制性核酸内切酶和DNA连接酶处理

第三部分阅读理解(共15小题；每小题2分，满分40分)

第一节{共15小题；每小题2分．满分30分)

阅读下面短文，从每题所给的四个选项(A、B、C和D)中，选出可以填人空白处的最佳

项，并在答题卡上将该项涂黑。   

Benjamin Banneker was a farmer，inventor，astronomer writer and antislavery supporter．He created the first American—built striking clock．

That fall，as usual，Benjamin rode to the nearby town for supplies．He couldn’t wait to get to the end of the road and buy the things his mother wanted．Then he could have a good talk with the folks in town．The truth was，as much as Benjamin loved his mother and father and three sisters，what he really enjoyed was talking about books or math problems or what was happening in other parts of the colonies(殖民地)．

It was about l0 o’clock by the sun when Benjamin arrived at a store．He ordered a bolt(一卷)of white cloth for his mother and looked around for someone to taik to．Benjamin’s heart jumped like a rabbit when he saw a friend holding a gold watch．Benjamin had always wanted to figure out how clocks and watches worked．The friend saw Benjamin and let him sit down for a good talk．

Late that afternoon，Benjamin rode home，slowly．He didn’t want to harm the watch that his friend had let him borrow．That nigh after supper，Benjamin carefully laid the watch on the table and pulled the candle closer．“This is a watch，”he said．“A man in fown lent it to me，and now I’m going to take it apart and draw the pieces．Then 1’11 put it back together again．Benjamin held his breath and gently took the back off the watch．

Every evening for a week，Benjamin sat at the table with the watch．He copied eaeh tiny

wheel and pin．When the week was up，he put the pieces back togelher and returned the watch to its owner．Then Benjamin got a good night’s sleep．

The next day when the farm work was done，Benjamin went into the woods to 1ook for just the right pieces of wood．Not too old，not too dry，not too green，not too soft．

For two years，Benjamin farmed all day and worked on his wood pieces at night．In1753，two years after he had borrowed the watch，Benjamin put all the pieces together．Benjamin had made his own clock．

1．The most likely reason the author wrote the passage was to__________．

A．show the influence Benjamin Banneker’s family had on him

B．present reasons for Benjamin Banneker’s fascination with clocks

C．explain Benjamin Banneker’s reason for becoming an inventor

D．give an example of Benjamin Banneker’s strong will and intelligence

2.Benjamin especially looked forward to going to the store to __________.

A．avoid work on the farm    B．purchase white cloth

C．meet interesring people    D．show his new clock to others

3．Why did Benjamin most likely hold his breath when he took the back off the watch?

A．He feared his friend might want to get the watch back．

B．He was very nervous about taking apart a precious object.

C．He wanted to time how long it would take to finish the job．

D．He was afraid that broken watch parts would fly into his face．

随时随地为别人着想，成了王冬的习惯。今年8月，王冬因患慢性阑尾炎，去南京检查治疗，刚下火车就遇上南京市爱心协会组织的义务劳动。他不顾身体虚弱，也上前参加了劳动。他就是这样不顾自己，只为别人着想。 最能准确复述这段话主要意思的是( )

A．王冬一心只为别人，从不为自己着想

B．王冬身体并不好，今年8月他还去南京治病

C．王冬养成了随时随地为别人着想的习惯，连去南京治病时都不顾身体虚弱参加劳动

D．王冬是在身体不佳的情况下主动参加义务劳动的

在密闭的容积可变的容器中通入A、B两种气体，在一定条件下反应：2A(g)＋B(g) 2C(g)　ΔH＜0。达到平衡后，改变一个条件，下列量(Y)的变化不符合图中曲线的是（  ）