单项选择题

A．It is a very good insulator.
B．It is a kind of lubricant.
C．It is a new type of gasoline.
D．It is a wax coat.
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单项选择题
A．We should try our best to prevent disablement.B．Both physical and metal barriers are hard to break down.C．We should take a proper attitude towards the disabled.D．The able-bodied people will never fully understand the disabled.
A．We should try our best to prevent disablement.
B．Both physical and metal barriers are hard to break down.
C．We should take a proper attitude towards the disabled.
D．The able-bodied people will never fully understand the disabled.
单项选择题
A．She is taking a picture.B．She is typing.C．She is playing the piano.D．She is making a photocopy.
A．She is taking a picture.
B．She is typing.
C．She is playing the piano.
D．She is making a photocopy.
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