下列各项，属肝硬化门静脉高压的表现的是（）
A.腹水
B.肝大
C.出血倾向
D.肝掌
E.皮肤色素沉着
参考答案：A
As he didn’t have much money, he had to ____ a second- hand computer for his work.
A．pick up
B．give up
C．look up
D．take up
简述遗传素质在人的身心发展中的作用。
