单项选择题


Questions 11 to 18 are based on the conversation you have just heard.

A．He can’t tear either piece of cloth.
B．He wants part of each piece of cloth.
C．The pieces of cloth are made by a secret process.
D．The pieces of cloth seem identical to him.
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单项选择题
Human beings make themselves different from other animals by ______ .
A．having the ability to perceive danger
B．having a far greater memory capacity
C．having the ability to recognize faces and places on sight
D．having the ability to draw on past experiences
单项选择题
A．structureB．systemC．functionD．organism
A．structure
B．system
C．function
D．organism
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