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【单选题】
在Rt△ABC中∠C=90°,BC= ,AC= ,则∠A= [     ]
A.
90°
B.
60°
C.
45°
D.
30°
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A.
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B.
consensus on project goals
C.
involvement in developing task objectives
D.
All of the above.
E.
B and C
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A.
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D.
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A.
同时设计
B.
同时评估
C.
同时施工
D.
同时投产使用
【多选题】按照费用构成要素,工程建设定额可划分为
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B.
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C.
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D.
机械台班消耗定额
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