肝脏的血液供应，主要来自()
A．肝动脉
B．肝静脉
C．肝小叶中央静脉
D．门静脉
E．肠系膜上动脉
参考答案：D
A _____ ice cream scoop is used for scooping really cold ice cream. [ ]
A. heating
B. heated
C. heat
D. temperature
按重量计含铜80%、锌15%、银3%、金2%的金属合金条(非货币用)
