单项选择题

A．Two million.
B．Three million.
C．Five million.
D．Six million.
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单项选择题
A．They help people save time on housework.B．They go into the garbage heap.C．They are harmful to the environment.D．They make products more expensive.
A．They help people save time on housework.
B．They go into the garbage heap.
C．They are harmful to the environment.
D．They make products more expensive.
单项选择题
A．Acquiring a true sense of responsibility.B．Focusing on the desire to fulfill.C．Getting ready for the worst.D．Imagining objects to obtain and process.
A．Acquiring a true sense of responsibility.
B．Focusing on the desire to fulfill.
C．Getting ready for the worst.
D．Imagining objects to obtain and process.
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