单项选择题

A．Once a week.
B．Three every month.
C．Five every month.
D．Two every month.
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单项选择题
A．It’s hereditary.B．The shampoo he used caused it.C．He combs his hair too much.D．He is old enough to lose hair.
A．It’s hereditary.
B．The shampoo he used caused it.
C．He combs his hair too much.
D．He is old enough to lose hair.
填空题
The Japanese team thinks that research techniques similar to their own could be used to bring about more _______________________.
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