非甾体抗炎药最常见的不良反应是 A．胃肠道损害 B．胃肠道反应 C．低血糖 D．耳毒

（18分）如图在xoy平面内有平行于x轴的两个足够大的荧光屏M、N，它们的位置分别满足y=l和y=0，两屏之间为真空区域。在坐标原点O有一放射源不断沿y轴正方向向真空区域内发射带电粒子，已知带电粒子有两种。为探索两种粒子的具体情况，我们可以在真空区域内控制一个匀强电场和一个匀强磁场，电场的场强为E，方向与x轴平行，磁场的磁感应强度为B，方向垂直于xoy平面。

试验结果如下：如果让电场和磁场同时存在，我们发现粒子束完全没有偏转，仅在M屏上有一个亮点，其位置在S（ 0 , l ）；如果只让磁场存在，我们发现仅在N屏上出现了两个亮点，位置分别为P（ -2l ， 0 ）、Q（ ，0 ），由此我们可以将两种粒子分别叫做P粒子和Q粒子。已知粒子间的相互作用和粒子重力可以忽略不计，试求（坐标结果只能用l表达）：

（1）如果只让磁场存在，但将磁场的磁感应强度减为B₁= ，请计算荧光屏上出现的所有亮点的位置坐标；

（2）如果只让电场存在，请计算荧光屏上出现的所有亮点的位置坐标；

（3）如果只让磁场存在，当将磁场的磁感应强度变为B₂= kB时，两种粒子在磁场中运动的时间相等，求k的数值。

阅读理解

      I told my friend Graham that I often cycle the two miles from my house to the town centre but

unfortunately there is a big hill on the route. He replied, "You mean fortunately." He explained that

I should be glad of the extra exercise that the hill provided.

      My attitude to the hill has now changed. I used to grumble as I approached it but now I tell

myself the following. This hill will exercise my heart and lungs. It will help me to lose weight and get

fit. It will mean that I live longer. This hill is my friend. Finally as I wend my way up the incline I

console myself with the thought of all those silly people who pay money to go to a gym and sit on

stationery exercise bicycles when I can get the same value for free. I have a smug smile of satisfaction

as I reach the top of the hill.

     Problems are there to be faced and overcome. Helen Keller was the first deaf and blind person

to gain a University degree. Her activism and writing proved inspirational. She wrote, "Character

cannot be developed in ease and quiet. Only through experiences of trial and suffering can the soul

be strengthened, vision cleared, ambition inspired and success achieved."

      One of the main determinants of success in life is our attitude towards adversity. From time to

time we all face hardships, problems, accidents, afflictions and difficulties. Some are of our making

but many confront us through no fault of our own. Whilst we cannot choose the adversity we can

choose our attitude towards it.

     The biographies of great people are littered with examples of how they took these kinds of steps

to overcome the difficulties they faced. The common thread is that they did not become defeatist or

depressed. They chose their attitude. They chose to be positive. They took on the challenge. They won.  

1. Which of the following would be the best title of the passage?

A. Attitude makes difference

B. Well begun is half done.

C. The early bird gets the worm.

D. Easier said than done.

2. From Helen Keller's example we can infer that__________.

A. Great people are born to be great and successful

B. Life is hard and difficult so we have to give up

C. We cannot achieve anything with an easy life

D. Practice makes people successful and powerful

3. What do you think the author is most likely to suggest if he/she continues to write?

A. Some examples of our daily life.

B. His stories of overcoming difficulties.

C. Stories of some unlucky great people.

D. Some examples of his friend Graham.

4. The underlined word "adversity " in the fourth paragraph probably NOT refers to ______.

A. problems

B. difficulties

C. hardships

D. advertisements

肾细胞癌的描述，不正确的是（）。

A.分为透明细胞型、颗粒细胞型和未分化型三种

B.可伴有肉眼血尿

C.2～3cm直径的小肿瘤，有时呈强回声

D.彩色多普勒有助于肾癌诊断

E.不会发生肾静脉和下腔静脉癌栓

主旋律作品观点未必极端，标题未必惹眼球，但她给人心灵的______是不可替代的。她是社会______时的一碗清水，是经济火热、思维骚动时的一丝______，构成一个生机社会无形的精神规则。
填入画横线部分最恰当的一项是：

A．荡涤 迷失 宁静
B．震撼 焦虑 清风
C．温暖 困惑 平和
D．抚慰 浮躁 和谐

应用电动吸引器为患者洗胃时，须注意洗胃液温度以（）为宜，每次灌注量（）mL，防止胃扩张或消化道穿孔。