单项选择题

A．Because human faces have complex features.
B．Because human fingerprints provide unique information.
C．Because people’s behavior can be easily described in words.
D．Because people differ in their behavioral and physical characteristics.
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单项选择题
A．At 9:00.B．At 9:15.C．At 9:25.D．At 10:00.
A．At 9:00.
B．At 9:15.
C．At 9:25.
D．At 10:00.
单项选择题
A．Einstein was popular in America.B．Einstein headed a research institute.C．Einstein received the Nobel Prize twice.D．Einstein went to America just after WW II.
A．Einstein was popular in America.
B．Einstein headed a research institute.
C．Einstein received the Nobel Prize twice.
D．Einstein went to America just after WW II.
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