题目

At the head of the valley we turned right and ______ the summit.a. set up b. took up c. made for d. went for 答案:C如图,将一副三角板和一张对边平行的纸条按下列方式摆放,两个三角板的一直角边重合,含30°角的直角三角板的斜边与纸条一边重合,含45°角的三角板的一个顶点在纸条的另一边上,则∠1的度数是 A.30°              B.20°                C.15°       D.14°
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