在实际放样中，当构件板厚t大于（）时，必须考虑板厚对展开图尺寸的影响。
A.1mm
B.1.5mm
C.2mm
D.3mm
参考答案：B
天宫楼阁
In this passage RDAs refers to ______.
A．types of vitamins
B．types of protein
C．types of minerals
D．amounts of energy, protein, vitamins, and minerals
