单项选择题

Chemisty is closely ______ with other studies: physics, biology and so on.

A．corresponded
B．concerned
C．correlated
D．cooperated
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单项选择题
Because of recent political and economic upheavals in these countries, it seems likely that the trend will be toward decentralized, Western-style systems.
A．conceptions
B．innovations
C．chaos
D．transitions
单项选择题
As we can no longer wait for the delivery of our order, we have to ______ it.
A．postpone
B．refuse
C．accept
D．cancel
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