题目内容
（请给出正确答案）
In this passage, when the author mentions "hundreds of deaths", he refers to______.
A．the deaths of hundreds of ova
B．the deaths caused by abortion
C．the natural deaths of old people
D．the deaths of hundred of boaies
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更多“In this passage, when the author mentions "hundreds of deaths", he refers to______.A．the d”相关的问题
According to the passage, a teacher' s duty is to______.
A．providing students with help when necessary
B．finding out students' mistakes and correcting them
C．teaching students the essential knowledge that they will need in their future life
D．telling students the correct answers
Which of the following is NOT mentioned in the passage？
A．People usually feel depressed when their friends move away.
B．People may call and write to their friends.
C．People like their new friends very much if they get to know them.
D．People must depend upon their friends for everything.
From the passage we can see that________
A．officials and students are debating whether they should have free speech
B．in the past decade, people did not have any freedom of speech
C．some students are attacked politically as targets
D．officials and students are discussing ways of avoiding offending messages
According to the passage people who have experienced ups and downs may become
A．nervous when faced with difficulties'
B．physically and mentally tired
C．more able to deal with difficulties
D．cold toward what happens to them
According to the passage, the Mississippi River was
A．one of the boundaries of a region where new agricultural settlement took place
B．a major source of water for agricultural crops
C．the primary route by which agricultural crops were transported
D．a main source of power for most agricultural machinery
How do fireworks produce their colors？
Chemicals that give off bright, distinct colors when burned provide the spectacular colors associated with fireworks. Charcoal and iron, for instance, burn brilliant orange. Strontium salts produce red and barium nitrate gives off green. Blue is the most difficult color to produce, and chemists are still searching for a compound that produces a true shade of blue.
Once a manufacturer chooses the colors for a firework, the appropriate chemical powders are compressed into small pellets called stars. These stars are normally packed into a Shell containing gun powder. The shell is then put in a launcher — a close-fitting tube, closed at one end, that has been hammered into the ground. The tube acts like a cannon as the pressure from the exploding gunpowder and expanding gases become trapped behind the shell arid shoot it into the sky.
Depending on the shell design and amount of stars, the firework display varies. A Roman candle, for example, contains only a few stars and shoots them out one at a time, while an aerial shell contains hundreds of stars — each of which leaves a single trail of brilliant color in the sky. For more information about fireworks, contact the National Council on Fireworks Safety, in Washington, D.C., at www. fireworksafety. Com.
The "stars" described in the passage are______.
A．shells that are put in a launcher
B．heavenly bodies in the sky
C．brilliant colors produced by fireworks
D．compressed chemical powder
A.做什么(WhA t)
B.为什么要做(Why)
C.何时做(WhE n)
D.何地做(WhE rE )
E.何人做(Who)
F.是否要做(WhE thE r)
________ he discovered in his experiment is very important to us.
A、That
B、When
C、What
D、Where
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