题目内容

The expression "waxings and wanings" (Paragraph 2) most probably means______

A. regularities and eccentricities.
B. vaporizations and sediments.
C. variants and constants.
D. maximizations an minimizations.

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The word "cheerleader" (Paragraph 4) can best be replaced by______

A. voter.
B. advocator.
C. critic.
D. prophet.

In the eyes of the author, the dictates of fashion probably means a sort of design characterized by______

A. obsolescence and sensibility.
B. uniqueness and stability.
C. creativity and hypocrisy.
D. inconstancy and irrationality.

As pointed out in the text, the ratio of oxygen -18 to oxygen -16 in seafloor sediments and that of these isotopes locked in glaciers and ice-sheets are______

A. irrelevant
B. correlated.
C. corresponding.
D. identical.

It can be concluded that anti-smoking campaigns should be conducted______

A. insidiously and discreetly.
B. vividly and attractively.
C. aggressively and drastically.
D. disinterestedly and bravely.

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