单项选择题

What have researchers found in their studies of hand preference?（）

A．Children don't show strong hand preference until six.
B．Children under three tend to have a favorite eye and ear.
C．There are as many male left-handers as female ones.
D．Left-handers are more interesting than right-handers.

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单项选择题

The word rows (Line 1, Paragraph 1) most probably refers to（）

A．groups of people.
B．noisy arguments.
C．subsequent events.
D．tragic happenings.

单项选择题

Which of the following is true of the Sophists（）

A．Their teaching turned out to be persuasive.
B．Their schools were located mostly in Athens.
C．They undermined the morality of the society of their time.
D．They exerted considerable influence over later generations.