如右图所示,为同一打点计时器打出的两条纸带,由纸带可知 ( ) A.在打下计数

题型:实验题

问题:

如右图所示,为同一打点计时器打出的两条纸带,由纸带可知 (  )

A.在打下计数点“0”至“5”的过程中,纸带甲的平均速度比乙的大

B.在打下计数点“0”至“5”的过程中,纸带甲的平均速度比乙的小

C.纸带甲的加速度比乙的大

D.纸带甲的加速度比乙的小

考点:实验:探究弹力与弹簧伸长的关系实验:探究小车速度随时间变化的规律实验:探究加速度与力、质量的关系实验:探究功与速度变化的关系
题型:实验题
完形填空。
     Like the body, the memory improves with use.  1  the body, the memory can improve with age.
     For many years, doctors have been studying the way the brain  2 . We all know that the brain has two
sides, the left and the right. The right side controls the senses and the left side of our brain controls our
logical  3 . We call the left side the "education" side of the brain, and generally, in western countries, people
have  4  this side of the brain more than the right side.
     Scientists believe that our brain will work more efficiently if both the right side and the left side are
developed equally. In many schools today, teachers try to educate children in such a way that both sides of
the brain are  5 . This can be done with logical subjects  6  math and science as well as with creative subjects
such as art. Albert Einstein, the great scientist, did some of his best work when he was very old. He was  7
 not only in his work, but also in creative and imaginative activities. It was because of his many different
interests in life that he was able to  8  the full development of both sides of his brain.
( )1. A. Like       
( )2. A. works      
( )3. A. acting     
( )4. A. studied    
( )5. A. worked     
( )6. A. including  
( )7. A. interested 
( )8. A. follow     
B. Likely  
B. thinks  
B. thinking
B. improved
B. used    
B. besides 
B. enjoy   
B. reach   
C. As       
C. improves 
C. choosing 
C. developed
C. taught   
C. except   
C. enucated 
C. watch    
D. Unlike 
D. grows  
D. testing
D. liked                    
D. thought            
D. as     
D. excited
D. stop   
题型:实验题

计算:(-4)3=______;(-1)2011-(-1)2010=______.

题型:实验题

计算:35a7b3c÷7a4bc=______.

题型:实验题

青年农民,9月1日入院,4天来发热、头痛,全身酸痛、乏力,今起心慌、气短、咳嗽,痰带血。查体:体温40℃,面色苍白,心率124次/分,呼吸36次/分,肺部散在湿性啰音。血象:WBC9.6×109/L.N080,L0.20。X线胸片示肺纹理增多,有散在点片状阴影。最可能的诊断是()

A.支气管肺炎

B.粟粒型肺结核

C.支气管扩张并感染

D.急性血吸虫病

E.钩端螺旋体病

题型:实验题

需氧培养法培养细菌一般需多少时间()

A.4~8小时

B.8~12小时

C.12~18小时

D.18~24小时

E.24~30小时

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