我国对新建企业噪声卫生标准的规定是,每日工作8小时,噪声强度不得超过() A.80d

题型:单项选择题 A1型题

问题:

我国对新建企业噪声卫生标准的规定是,每日工作8小时,噪声强度不得超过()

A.80dB(A)

B.85dB(A)

C.90dB(A)

D.95dB(A)

E.115dB(A)

考点:广西公共卫生住院医师规范化培训职业卫生与职业医学职业卫生与职业医学题库
题型:单项选择题 A1型题

下列关于单位的正确用法是()。

A.实验从13h3min25s开始

B.手术用时07:15:30

C.Ⅱ度烧伤

D.新闻30′

题型:单项选择题 A1型题

Marley is a businessman. His business is freezing people. He works for a company in California called Trans Time. Trans Time freezes people after they die. Why does Trans Time freeze people? Doctors today can cure many diseases, but they cannot cure all diseases. People still get sick and die. Maybe in the future doctors will have medicine for all diseases. Some people think so. They want Trans Time to freeze their bodies after they die. Maybe 100 or 200, or 300 years later, Trans Time doctors will bring the people back to life. The doctors will cure their diseases, and the people will be alive and healthy again.

People often ask the scientists at the Trans Time, “How will Trans Time bring dead people back to life?” They say, “We can freeze a healthy animal and bring it back to life. We think that someday it will be possible with human.” When they say “someday”, they mean years from now — maybe 100 or 200 years. How can Trans Time keep people frozen for 200 years?

After a person dies, workers at Trans Time cool the body with ice and chemicals. When the body is very cold, workers put the body into a capsule (密封舱). They fill the capsule with liquid nitrogen (液氮). The temperature in it is 196 degrees centigrade below zero. Every two weeks workers add more liquid nitrogen. The liquid nitrogen keeps the bodies frozen.

Trans Time charges $21,000 to freeze a body and $59,000 to keep a body frozen. That’s $80,000 all together. It is a lot of money. But some people think that $80,000 is a fair price. It’s a fair price for a chance to live again, isn’t it?

小题1:What kind of people does Trans Time serve? (No more than 2 words)

                                                                               

小题2:How much should one pay together, if he wants his body to be cooled and kept by Trans Time?

(No more than 2 words)

                                                                               

小题3:Why do people want to be frozen? (No more than 9 words)

                                                                               

小题4:What is the main idea of Paragraph 3? (No more than 6 words)

                                                                             

题型:单项选择题 A1型题
下列实数中,-
1
7
311
π
2
、-3.14,
25
3-27
、0、0.3232232223…(相邻两个3之间依次增加一个2),无理数的个数是(  )
A.1个B.2个C.3个D.4个
题型:单项选择题 A1型题

投资一笔国债,5年期,平价发行,票面利率12.22%,单利计息,到期收取本金和利息,则该债券的投资收益率是( )。

A.9%

B.11%

C.10%

D.12%

题型:单项选择题 A1型题

汽车在道路上行驶必须满足两个条件:1.驱动力必须大于或等于();2.驱动力不能大于轮胎与路面间的()。

A.各项阻力之和

B.附着力

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