题目内容

A．Rent would be very expensive.B．Public transportation wouldn't be available.C．Apartme

A. Rent would be very expensive.
B. Public transportation wouldn't be available.
C. Apartment complexes in Windsor are old.
D. Apartments in Windsor tend to be noisy.

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Dalton wondered why the heavier and lighter gases in the atmosphere did not separate as oil and water do. He finally concluded that the constituent【C1】must exist in the form. of 【C2】particles or atoms and that these【C3】be completely mixed together in the【C4】. This threw a new light in【C5】laws of definite proportions. It was 【C6】necessary to suppose that the atoms【C7】combine into small groups of uniform【C8】and so form. more complex substance;【C9】the mystery of this law was【C10】. Dalton suggested, for example, that carbon monoxide【C11】formed by the one with one【C12】of atoms of carbon and oxygen,【C13】carbon dioxide results from a single【C14】of carbon uniting with two atoms【C15】oxygen. Assuming this to be true,【C16】the definite proportions of Prout' s law (【C17】all chemical compounds the different constituents【C18】enter in unvarying proportions) would naturally【C19】the relative weights of the many【C20】kinds of atoms.
【C1】

A. gases
B. pieces
C. things
D. gas

A．Big windows.B．A good view.C．Tall buildings.D．Pleasant rooms.

A. Big windows.
B. A good view.
C. Tall buildings.
D. Pleasant rooms.

A．YB．NC．NG

A. Y
B. N
C. NG

听力原文：M: You study harder than Nancy.
W: To be honest, Mary works even harder.
Q: Who works hardest？
(18)

A. The man.
B. Mary.
C. Nancy.
D. No one.