单项选择题

A．Because people differ in their behavioral and physical characteristics.
B．Because human fingerprints provide unique information.
C．Because people’s behavior can be easily described in words.
D．Because human faces have complex features.
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单项选择题
A．She was seriously ill.B．She can’t take in what the professor says in class.C．She dislikes the way by which a conversation is conducted.D．She is bored with the way the professor gives his classes.
A．She was seriously ill.
B．She can’t take in what the professor says in class.
C．She dislikes the way by which a conversation is conducted.
D．She is bored with the way the professor gives his classes.
单项选择题
A．Because it is easier for the parents to do so.B．Because the teachers may not permit the later solution.C．Because children may prefer it.D．Because it will give children a chance for doing something challenging.
A．Because it is easier for the parents to do so.
B．Because the teachers may not permit the later solution.
C．Because children may prefer it.
D．Because it will give children a chance for doing something challenging.
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