計(jì)算單側(cè)采光的采光系數(shù)時(shí),其計(jì)算點(diǎn)應(yīng)選在圖中哪一點(diǎn)?
A.點(diǎn)1 B.點(diǎn)2 C.點(diǎn)3 D.點(diǎn)4
A.cd/m2 B.cd C.lm D.lx
A.1/2 B.1/3 C.1/5 D.1/10