Mr. Smith will pay a visit to Beijing this autumn, ________ we will enjoy the Olympic Games in 2008.
A. where
B. when
C. which
D. how
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画剖视图时,不管情况如何,一律应标出剖切位置及剖视图的名称。
A. 对
B. 错
局部剖视图的波浪线可以用轮廓线代替。
A. 对
B. 错
机件上的肋板当剖切平面通过肋板厚度的对称平面或轮辐的轴线时,这些结构()剖面符号。
The treatment will continue until the patient reaches the point ________ he can walk correctly and safely.
A. when
B. where
C. which
D. whose