As is ofen the case,we have worked out the production plan.

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• 1、( ) to sunlight for too much time will do harm to one's skin.A Exposed B Being exposedC Having exposed D After being exposed 2、A middle-aged woman came ( )to the bus stop only( ) the bus had gone.A run;to find B running;to find C and ran;found D running;finding3、（ ） is often the case,we have worked out the produce plan.A Which B When C What D As
• As is often the case,we have worked out the production plan.
• As is ofen the case,we have worked out the production plan.
• ___is ofen the case,we have worked out the production plan
• ____is ofen the case,one third of the workers have over-fulfilled the production plan.
• 能够体现联系观的哲学故事.
• 在平面直角坐标系中,O是原点,已知A(-3,-1),B(4,1),C(4,-3),则向量BA在向量OC方向上的投影是______.