红细胞上含有H凝集原，其血清中含有抗A和抗B凝集素者，其血型为O型。
试评述王夫之情景理论的内涵及其意义。
景观
在制作使用路径控制渐变移动动画时，下列工具能绘制出所需路径的是（） ["铅笔","线条","椭圆、矩形或刷子工具","矩形"]
Which of the following could be used to provide a Layer 3 data path between separate VLANs？（） [" VLAN trunking"," An external router"," An internal route processor"," VLAN capable bridge"," EtherChannel"]
生态系统的（）功能，是从“禁止入内”起作用，（）功能是通过“快速排出”来达到目的。
