单项选择题

Usually a speech of presentation is made at an award ceremony and is always followed by a speech of acceptance.
A、正确
B、错误

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不定项选择
在与岩层走向线垂直的直立平面图，不同海拔两点的海拔差、水平距与真倾斜线构成一个直立的直角三角形，该直角三角形中海拔差边对应的锐角就是岩层的真倾角。
A．错误
B．正确
未分类题
As we listen to the arguments about bilingual education today, we ought to think ourselves back into the shoes of the Saxon peasant.
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