下列哪种能源是绿色能源（）
A.石油
B.天然气
C.生物乙醇燃料
D.煤炭
参考答案：C
Opiate withdrawal causes severe physical discomfort and can be life-threatening. To minimize these effects, opiate users are commonly detoxified with which drug
A. Barbiturates.B. Amphetamines.C. Methadone.D. Benzodiazepines.
对胰腺癌诊断最好的指标是（）
A.CA125
B.POA（胰胚胎抗原）和CA199
C.AFP
D.CA50
E.CA153
