填空题

Why the manufactures did not accept the new design.

【参考答案】

Bicycle manufactures were unaware of the problem.
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单项选择题
A．He keeps the egg warm.B．He builds a nest for the egg.C．He defends the colony.D．He gathers food for the females.
A．He keeps the egg warm.
B．He builds a nest for the egg.
C．He defends the colony.
D．He gathers food for the females.
填空题
In which of the following ways does the handgrip work
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