单项选择题

The two most important ________ in making a cake are flour and sugar.

A．elements
B．components
C．ingredients
D．constituents
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单项选择题
An urgent social challenge in the future will be to ensure that science and technology develop in this direction.
A．inclusively
B．exclusively
C．cohesively
D．accidentally
单项选择题
Cultural ________ indicates that human beings hand their languages down from one generation to another.
A．translation
B．transition
C．Transmission
D．transaction
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