单项选择题

Which of the following countries still cannot send a human in space orbit, according to the text

A．Japan
B．United States
C．Russia
D．China
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单项选择题
What does the speaker illustrate with the example of muscle
A．The need to exercise the memory.
B．How the brain differs from other body tissues.
C．The unconscious learning of a physical activity.
D．How nerves control body movement.
单项选择题
According to the speaker, what was the first advertisement
A．Samples of products.
B．Signs on shops.
C．Pictures of products painted on walls.
D．Free paper pamphlets.
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