关于铁吸收的叙述，正确的是
A、胃大部切除术后胃内铁吸收减少D
暂无解析
Johnsaysthathispresentjobdoesnotprovidehimwithenough______forhisorganizingability.
设函数，其中n为正整数,则f'(0)=()
Theaddressbook________theemailaddressesofyourfriendsorgroupsofcolleagues.
________(catch)intherain,hewaswettotheskin.
求曲线y=x^2与直线y=0，x=1所围成的平面图形绕x轴旋转一周所得旋转体的体积V.
