有10万吨东北大米从沈阳运往厦门，选择下列哪一种交通方式比较合适： A．公路 B

— Tony said he could fix my bicycle, but I really doubt it.

— _____. He's very good at this sort of thing. [ ]

A. Don't worry

B. I couldn't agree more

C. Of course

D. A piece of cake

投资者将资金投入房地产后，失去了其他投资机会，同时也失去相应可能收益的风险是指( )。

A．时间风险

B．比较风险

C．利率风险

D．资本价值风险

引起门静脉高压症的最常见原因是

A．肝炎后肝硬化

B．血吸虫性肝硬化

C．胆汁性肝硬化

D．先天性门静脉狭窄

E．肝包虫病

Never believe anything  ______   any other person has believed it. Use your own head.

A．that

B．when

C．because

D．once

简述计算机的基本组成，分别说明各部分的作用。