起重机在附着框架和附着支座布设时，附着杆倾斜角不得超过（）。 A.5° B.10°

阅读理解。

     George Stephenson was born in 1781 in a poor family. He had to start work when he was only

eight. When George was fourteen, he became his father's helper. He spent a lot of time learning about

engineers (发动机). And on holidays he often made one engine to pieces and studies each piece

carefully. Soon he became a very good worker though he could not read or write. He began to learn

English letters when he was seventeen years old. Every day after he did twelve hours of hard work, he

walked a long way to have lessons from a young school teacher. On his eighteenth birthday, he wrote

his own name for the first time in his life. George invented (发明) many things in his life. The train was

the greatest one among them. Today when we take trains (火车) from one place to another, we'll think

of this great man ---George Stephenson.

1. He learned about the engine ______.

A. through reading and writing    

B. by making it to pieces and studying each piece carefully  

C. at lessons from a young teacher

D. by asking a lot of questions.

2. He spent a lot of time learning about engines and soon he became ______.

A. a great man    

B. a good maker      

C. a good worker  

D. a good student

3. George Stephenson invented ______.

A. the train    

B. the telephone    

C. the car      

D. the computer

4. From the passage we know George Stephenson was one of the greatest ______ in the world.

A. workers      

B. learners      

C. writers      

D. invertors (发明家)

5. Which is the best title (题目) for the passage?

A. The train

B. The Great Inventor

C. The story of George Stephenson's life

D. Engineer

钱乘旦说：大革命后法国“社会持续动荡……工业化进程缓慢。直到1870年后，法国模式突然发生转折，由对抗转为妥协。此后再没发生大规模的革命，法国人开始用协商手段逐步建立起民主制度”。这说明作者[ ]

A．否定法国大革命的作用

B．强调兴民权的重要性

C．强调政治协商的重要性

D．反对大规模社会变革

下列疾病腹泻常伴重度失水的是（）。

A.吸收不良综合征

B.霍乱

C.慢性溃疡性结肠炎

D.肠结核

E.结肠癌

如图所示，有位于竖直平面上的半径为R的圆形光滑绝缘轨道，其上半部分处于竖直向下、场强为E的匀强电场中，下半部分处于水平向里的匀强磁场中。质量为m，电量为q的带正电小球，从轨道的水平直径的M端由静止释放，若小球在某一次通过最低点时对轨道的压力为零，求：

（1）磁感强度B的大小。

（2）小球对轨道最低点的最大压力。

（3）若要小球在圆形轨道内作完整的圆周运动，小球从轨道的水平直径的M端下滑的最小速度。

患者男，30岁，因“性功能下降6年”来诊。查体：身高176cm，体重79kg；皮肤无色素沉着，无胡须和喉结，有乳腺发育，无腋毛，阴毛少许，睾丸约3ml，质韧，阴茎约4cm。

为给诊断和治疗选择提供依据，应考虑的检查是（提示患者睾酮水平显著低于正常，并存在腹型肥胖，烦渴症状。）（）

A.睾丸超声

B.前列腺超声及特异性抗原测定

C.血糖测定，必要时口服葡萄糖耐量

D.其他垂体激素测定

E.精液常规

F.心脏MRI