肝窦周隙一般有(). ["血浆","贮脂细胞","肝细胞微绒毛","肝巨噬细胞","血细胞"]
随着真空处理时间延长,钢中气体减少,脱气速度()。 ["减慢","加快","不变"]
何谓循环式灌浆?有何要求?有什么优点和缺点?
下列气测异常可以用烃比值图版解释,其中评价为油层的是()。 ["C1/C2=1,C1/C3=20,C1/C4=5","C1/C2=8,C1/C3=20,C1/C4=30","C1/C2=40;C1/C3=20,C1/C4=10","C1/C2=70,C1/C3=150,C1/C4=15"]
能够生产不锈钢的精炼方法是()。 ["RH","RH-OB","VD"]
“离散眼球经济”