【名词&注释】
缓冲区(buffer)、活血祛瘀(activating blood removing stasis)、莱菔子(radish seed)、全口义齿修复、胶结剂(cementing agent)、藻酸盐印模材料(alginate impression material)
[单选题]糊剂型藻酸盐印模材料(alginate impression material)应用时,糊剂与胶结剂(cementing agent)的体积比为
A. 1∶2~1∶3
B. 1∶1~2∶l
C. 2∶1~3∶1
D. 3∶1~4∶1
E. 4∶1~5∶1