答:
1 The monkey threw the basket and ran away 2 At last the police helped them find the child.3 When his mother came in, the boy pretended to write 4 He often tells a lie, how good he lied 5 The ...
为了增加横梁抵抗弯曲的能力,我们通常把横梁 A 横着放 B.立着放 C...
答:
横梁立着放是增加厚度,提高了抗弯曲能力.