门静脉高压的特征性临床表现是（）
A.肝缩小
B.肝质地变硬
C.腹腔积液征
D.侧支循环的建立和开放
E.脾大
参考答案：D
A fantastic idea occurred to him ________ he could use a plastic bottle, ________ cut off, as a container to grow young plants in.
A．which; whose top
B．that; the top of which
C．that; with its top
D．whether; whose top
计算机的存储器中，组成一个字节(Byte)的二进制位(bit)个数是______。
A．4 B．8 C．16 D．32
