单项选择题

The number of hamburgers sold at a stand near the beach for a given week in the summer is shown in the previous chart. Approximately what was the ratio of hamburgers sold on the weekdays (Monday through Friday) to hamburgers sold on the weekend (Saturday and Sunday)（）

A. 2:5
B. 16:29
C. 3:4
D. 29:16
E. 5:2

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单项选择题

According to color psychologists, certain hues tend to reflect particular personality （）; violet, for example, indicates a tendency towards mysticism and intuition, while brown suggests an uncomfortable and aimless character.

A. flaws
B. aptitudes
C. traits
D. endowments
E. imperfections

单项选择题

The passage addresses which of the following differences between African dogs and American dogs（）

A．African dogs do not have owners, whereas American dogs do.
B．African dogs undergo intense behavioral training, while American dogs remain untrained.
C．African dogs learn to respect their owners, but American dogs cannot be disciplined.
D．African dogs retain more independence from their owners than do American dogs.
E．African dogs are more dominant over their owners than are American dogs.