单项选择题

What does the passage mainly discuss

A．The production of solar light and heat.
B．The physical and chemical nature of life.
C．The conversion of hydrogen to helium.
D．Radiation in the X-ray part of the spectrum.
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单项选择题
Which of the following best summaries Marlow' s ideas
A．People's needs cover a wide range.
B．People's needs vary among individuals.
C．People have more lower-order needs than their higher-order ones.
D．People's abstract desires are more important than the basic ones.
单项选择题
Which of the following is most clearly analogous (类似的) to the example of the person who fears dogs
A．A child chokes on a fishbone and as an adolescent he is reluctant to eat fish.
B．A person feels lonely and after a while he buys a dog for a companionship.
C．A child studies science in school and later grows up to become a teacher.
D．A person hears that a snowstorm is predicted and in that evening is afraid to drive home.
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