单项选择题

A．launch
B．introduction
C．sponsorship
D．promotion
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单项选择题
A．thereforeB．consequentlyC．howeverD．moreover
A．therefore
B．consequently
C．however
D．moreover
单项选择题
A．motivationB．momentumC．movementD．moment
A．motivation
B．momentum
C．movement
D．moment
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