The attitude to technology abuses during holiday and religious activities is
A. happy and joy.
B. angry and depress.
C. ignorant and unstable.
D. sensitive.
查看答案
Which of the following can be inferred from the passage？
A. Cancer can be passed on to the next generation.
B. Senior citizens are more vulnerable to the hurt of radiation.
C. The impact of radiation can be accessible over generations.
D. Scientists have found out solutions to radiation.
Why does the speaker say that radiation is similar to radio waves？
A. Because both of them can be detected by human senses.
Because both of them can be sensed by a radio receiver.
C. Because both of them are harmful.
D. Because both of them can only be detected by devices.
According to the passage, why does the cancer increase？
A. Because people expose too much to the computer.
Because people don't care about the low levels of radiation.
C. Because the cells are killed by radiation.
D. Because the cells produce themselves in an unusual way.
费希纳定律表明，感觉的变化比刺激强度增长慢，即心理感觉量与物理刺激量的对数值成正比。公式为（）
A. I=KlgS
B. K=SlgI
C. S=KlgI
D. S=IlgK(其中，S为感觉量，K为常数，I为刺激强度)
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