题目内容
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A darkened sky in the daytime is usually an indication that a storm is______.
A．possibly coming
B．about to take place
C．close by
D．expected to be severe
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更多“A darkened sky in the daytime …”相关的问题
A.is
B.will be
C.was
D.had been
The faster anything goes up into the sky,
A. it reaches the highest B. it reaches the higher
C. the highest it reaches D. the higher it reaches
If the sky fell down, what______ ？
A．did you think would happen
B．do you think would happen
C．do you think will happen
D．do you think will have happened
How is food for plants made？ Food for plants is made ______.
A．from water
B．from the air in the sky
C．from the soil
D．from water, things in the soil and air and sunlight
In the paragraph 3, "his outdoor cousins" means ______.
A．other relatives
B．the other doves of the same brood (n. 窝)
C．doves under the natural sky
D．other birds in general
We can conclude from the passage that ______.
A．asteroids racing across the night sky are likely to hit Earth in the near future
B．workable solutions still have to be found to prevent a violent coming course of aster olds with the earth
C．the worry about asteroids can be left to future generations since it is unlikely to happen in our lifetime
D．while pushing asteroids off course nuclear weapons would destroy the world
Scientists counted the number of stars________.
A．to illustrate the impact of light pollution
B．to compare air quality in different areas
C．to see how the sky has changed with time
D．to arouse public interest in space
A.want their pigeons to win the race
B.are sending radar signals to their pigeons
C.do not know whether the race began on time
D.do not trust the rules set down by the judges
As you know, the turning of the earth makes the sun and the stars seem to move across the sky. Daylight, of course,【21】, when the sun rises in the east and when the sun is high【22】the sky, between these two positions, half of the daylight hours have been spent.
Therefore, by noticing【23】the sun stood in the sky, early man know they could tell the time of the day, At night the motion of the stars【24】the same purpose. The important thing in keeping time is to know the exact moment of【25】. For each of us, wherever we are, noon is when the sun is directly overhead. Think of an imaginary line【26】the sky, stretching from the north point of your horizon just to the south point.
When the sun cross your meridian (子午线), it is noon for you. When the sun still【27】of this line, or the meridian, it is morning. After the sun has crossed this line, it is【28】.
The Latin word for "midday" is "deridian",【29】which comes our word meridian. So AM is an abbreviation (缩写词) for "ante meridean", or before midday, and PM for after midday. Each or the world's time zones (时区) is about fifteen degrees wide in longitude (经度), which is about the distance the sun moves through tile sky in all hour.【30】lives in the same time zone observes noon at the same moment. In this way, the time is different by one hour as you move through each time zone.
(61)
A．comes
B．begins
C．appears
D．shines
