一般来说，花卉对气体有指示功能，如（）对二氧化硫很敏感。
A.丁香
B.百日草
C.波斯菊
D.向日葵
参考答案：D
—Where is Bill?
—He ________ Sydney with his father. [ ]
A. has gone to
B. has been to
C. have gone to
D. have been to
急性型DIC高凝期患者的治疗原则，除消除病因、治疗原发病外，应首先考虑
A．应用抗血小板药物
B．补充水与电解质
C．积极抗纤溶治疗
D．及早应用肝素
E．输注全血或血浆
