怎么样加强雅思阅读,要避开几大误区
Answer keys and explanations:
E
See the sentences in paragraph 1(There's a dimmer switch inside the sun that causes its brightness to rise and fall on timescales of around 100,000 years - exactly the same period as between ice ages on So says a physicist who has created a computer model of our star's ) and (Robert Ehrlich of George Mason University in Fairfax, Virginia, modelled the effect of temperature fluctuations in the sun's )
A B
See ?i style='mso-bidi-font-style: normal'>Grandpierre and a collaborator, Gábor ágoston, calculated that magnetic fields in the sun's core could produce small instabilities in the solar
C
See Edwards believes the small changes in solar heating produced by Milankovitch cycles are then amplified by feedback mechanisms on
D
See Nigel Weiss, a solar physicist at the University of Cambridge, is far from He describes Ehrlich's claims as "utterly implausible".
False
See for the past million years, ice ages have occurred roughly every 100,000 Before that, they occurred roughly every 41,000
False
See "In Milankovitch, there is certainly no good idea why the frequency should change from one to another," Nor is the transition problem the only one the Milankovitch theory
Not Given
See if sea ice begins to form because of a slight cooling, carbon dioxide?is locked into the That weakens the greenhouse (The passage doesn抰 mention anything about locking Co2 into ice )
True
See there is no lack of such "If you add their effects together, there is more than enough feedback to make Milankovitch work,"?"The problem now is identifying which mechanisms are at " This is why scientists like Edwards are not yet ready to give up on the current
True
See the sentences in (According to Edwards, 卙e "I can't see any way of testing [Ehrlich's] idea to see where we are in the temperature ") and (Ehrlich concedes "If there is a way to test this theory on the sun, I can't think of one that is practical).
constant
See According to the standard view, the temperature of the sun's core is held constant by the opposing pressures of gravity and nuclear
orbit
See Most scientists believe that the ice ages are the result of subtle changes in Earth's orbit, 匛arth's orbit gradually changes shape from a circle to a slight ellipse and back again roughly every 100,000
instabilities
See ?i style='mso-bidi-font-style:normal'>magnetic fields in the sun's core could produce small instabilities in the solar These instabilities would induce localised oscillations in
cycles
See …allow the sun's core temperature to oscillate around its average temperature of million kelvin in cycles lasting either 100,000 or 41,000
random
See Ehrlich says that random interactions within the sun's magnetic field could flip the fluctuations from one cycle length to the