治安行政处置,是指公安机关在公共场所管理、道路交通管理、消防管理、危险物品管理、特种行业管理和出人境管理等治安行政管理活动中,为维护社会秩序和公共安全,依法对特定的人、物、事、场所采取的命令、禁止与取缔、许可等权力行为。()
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在录用人民警察的程序中第一条就是要发布报考公告,报考公告应在考试前一定时间.通过公安机关内部通知的形式,让报考者有所准备。()
A. 正确
B. 错误
Space is a dangerous place, not only because of meteors (流星), but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential, for plants to make the food which we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation (辐射) from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in space. The unit of radiation is called "rem". Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage — a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed (畸形的) children or even grandchildren. Missions of the Apollo flights have had to cross belts of high radiation and, during the outward and return journeys, the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in space laboratory. Rugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.
According to the first paragraph, the atmosphere is essential to man in that it ______.
A. protects him against the harmful rays from space
B. provides sufficient light for plant growth
C. supplies the heat necessary for human survival
D. screens off the falling meteors
听力原文:W: The lecture starts in two minutes. You should have gotten up early this morning.
M: No. The train was delayed by an accident.
What is the woman complaining about?
A. That the man is late.
B. That they should have a class.
C. That he must speak for him.
D. That the train was delayed.
一般而言,上一级政府各部门可以在部门职权范围内向下级政府正式行文,其文种根据实际需要决定,而非仅限于函。 ()
A. 正确
B. 错误