关于血球细胞生成部位的叙述,错误的是
A、胚胎期,红细胞主要在肝、脾生成C
暂无解析
行列式
TheinteractionsbetweenChinaandtheUSwillsurelyhaveasignificant_______on.peaceandstabilityintheAsia.—Pacificregionandtheworldasawhole.
Studentsenrolledasfull-timecanfully____intheuniversityextracurricularclubs.
已知,二次型的秩为2,(I)求实数a的值;(II)求正交变换x=Qy将f化为标准形.
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.