预防肠道传染病的综合措施中,起主导作用的是
A.隔离治疗病人
B.隔离治疗带菌者
C.切断传播途径
D.接触者预防性服药
E.疫苗接种
参考答案:C
Of the 2,000 stock investors______ last month, 90% was found ________ in financial knowledge.[ ]
A. surveyed; lacking
B. having been surveyed; to lack
C. surveyed; lacked
D. to have been surveyed; lack
数量金额式账簿的收入、发出和结存三大栏内,都分设()等小栏。
A.数量
B.种类
C.单价
D.金额