And the drug【C2】______question is caffeine. Scientists estimate that over 70% of the world's population takes caffeine daily.【C3】______drink it in tea and coffee. Children drink in tin Coca Cola and【C4】______soft drinks. It is also found in chocolate.【C5】______, most people in the most places at any time are under the【C6】______of the drug.
There have been many scientific investigations【C7】______the exact effects of caffeine. Most people agree that it【C8】______the nervous system and helps the body make efficient use of energy. This is why many people【C9】______Asia drink tea with food and why westerners often end their meals【C10】______a cup of coffee.
Because the effect of caffeine is so【C11】______, there have been【C12】______attempts to stop people using it. A U. S. religious group which【C13】______the use of caffeine is generally regarded as eccentric(反常的). But because nearly everybody takes it, the total effect of caffeine【C14】______people is huge. Caffeine is the drug that changed the world.
Both tea and coffee were introduced to the West around 300 years ago. The effect of these new drinks was felt【C15】______. In New York, coffee houses were【C16】______with people making plans,【C17】______business and doing deals. And the deals done in the coffee houses were partly responsible【C18】______a rapid increase in American trade. History was moving【C19】______that direction anyway. But the arrival of coffee【C20】______everything up.
【C1】
A.everything
B.everyone
C.everyday
D.everywhere
第1题
关于图像模式的计数容量。正确的说法是
A、字节模式图像中每个像素计数容量是127
B、字模式图像中每个像素的计数容量是256
C、字节模式图像中每个像素的计数容量是512
D、字模式图像中每个像素的计数容量是65 535
E、字模式图像中每个像素的计数容量是1024
第2题
为降低动态图像的统计噪声,可以使用的方法是
A、减少放射性药物的使用剂量
B、增大采集矩阵
C、减小采集矩阵
D、改字节模式为字模式采集
E、改字模式为字节模式采集
第3题
为降低静态图像的统计噪声,可以使用的方法是
A、减少放射性药物的使用剂量
B、增大采集矩阵
C、减小采集矩阵
D、改字节模式为字模式采集
E、改字模式为字节模式采集
第4题
为解决静态图像采集过程中的计数溢出问题,可以使用的方法是
A、增大放射性药物的使用剂量
B、增大采集矩阵
C、减小采集矩阵
D、改列表模式为帧模式采集
E、改字模式为字节模式采集
第6题
A.Lab颜色是Photoshop在不同颜色模式之间转换时使用的中间颜色模式
B.位图模式下的图像被称为位映射一位图像,因为其位深度为1
C.灰度图像中的每个像素都有一个0(黑色)到255(白色)之间的亮度值
D.灰度图像中的每个像素都有一个0(白色)到255(黑色)之间的亮度值
第7题
动态图像采集常采用64×64的字节模式,一帧图像需要储存空间是
A、4KB
B、32KB
C、64KB
D、128KB
E、206KB
第8题
静态图像采集常采用256×256的字节模式,一幅图像需要储存空间是
A、4KB
B、32KB
C、64KB
D、128KB
E、256KB
第9题
动态图像采集常采用64×64的字节模式,一帧图像需要储存字节数是
A、4KB
B、32KB
C、64KB
D、128KB
E、256KB
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