A.柱距的1/6~1/3 B.柱距的1/10~1/6 C.柱距的1/12~1/8 D.柱距的1/8~1/4
A.樁長(zhǎng)的1/3 B.樁長(zhǎng)的1/2 C.樁長(zhǎng)的2/3 D.樁長(zhǎng)的3/4
A.1/3樁長(zhǎng) B.1/2樁長(zhǎng) C.2/3樁長(zhǎng) D.3/5樁長(zhǎng)