________ the work, they have to stay there for another two weeks. A.Not completing B.Not completed C.Not having completed D.Having not completed 答案:C图为血糖调节的模型,相关叙述中错误的是A.D经过体液定向运输后作用于肝脏细胞B.C作用的结果反过来影响C的分泌,D也是如此C.C与D两种激素表现为相互拮抗,共同维持血糖稳定D.血糖降低时,D和肾上腺素协同作用促进血糖升高