修理尺寸法是通过()配合件原设计尺寸,()配合件原设计件配合间隙,从而恢复配合件工作性能。
A.改变/改变
B.改变/恢复
C.恢复/改变
D.恢复/恢复
参考答案:B
More has been learned about the Moon than any other of the Earth''s neighbors in space because of the Apollo program, which enabled men to walk on the Moon and bring back hundreds of pounds of________.
A.rocks
B.rock
C.stone
D.stones
导游向游客提供的接待服务,对团体游客必须按______的规定和导游服务质量标准实施,对散客必须按______的内容和标准实施。