A.樁徑800mm,樁長(zhǎng)10m; B.樁徑420mm,樁長(zhǎng)2.5m; C.樁徑1000mm,樁長(zhǎng)4.5m; D.樁徑600mm,樁長(zhǎng)6m。
A.Ⅰ B.Ⅱ C.Ⅲ D.Ⅳ
A.10% B.20% C.30% D.50%