1m3自然状态下的某种材料,质量为2100kg,孔隙体积占25%,其密度是()g/cm3。
参考答案:2.8
—Do you think George has passed the driving test?
—No. If so, he _____his car to our college yesterday.
A.would drive
B.drove
C.would have driven
D.had driven
脂肪肝的营养治疗为()。
A.必须减轻体重和严格控制能量摄入
B.控制能量摄入,但不能骤减
C.能量摄入可不受限制
D.控制蛋白质的摄入
E.控制必需脂肪酸的摄入