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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热门试题

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.

问答题

Physiologically, when brain cells are activated by the memory process, the nerve cell coating becomes thicker and thicker with each repetition, strengthening the electrical pathway in brain that constitutes memory.