Which of the following statements is NOT true according to paragraph 3？
A. The Solar System is completely flat.
B. Mercury and Pluto are not in the same plane with other planets.
C. The planets formed from a nebular disc orbiting the Sun.
D. The Sun formed out of the same nebular disc with its planets.
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A cosmologist differs from a cosmogonist in that ______.
A. he sounds a bit old-fashioned
B. he learns from Edgar Allen Poe
C. he studies the origin of the whole Universe
D. he tries to explain how the Solar System formed
Adair points out that his theory can't be applied to aluminum bats because ______.
A. the "ping” sound is too vague for a fielder to catch
B. with the aluminum bats the batter always hits the ball stronger
C. they don' t produce different sounds of "crack" and "clunk"
D. the sounds they produce may interfere with the fielder's judgment
The biggest problem from now to the year 2010 for the ISS lies in that ______.
A. Soyuz capsules are not safe enough
B. the ISS will have a 4-year crewless gap
C. more money is needed to maintain the normal operation
D. the ISS partner nations can't reach agreement during this period
Why has the ISS now had only three crew members？
A. Because the Russian Soyuz capsules can't manage more.
Because the ISS has only enough room for three people.
C. Because three people are quite enough to run the ISS.
D. Because NASA commissions report to limit the number to three.
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