正负向构造在无断层的情况下应相间出现，其间过渡带的等值线走向应渐变而不能突变。
参考答案：对
I like this house with a beautiful garden in front, but I don't have enough money to buy _____. [ ]
A. one
B. it
C. this
D. that
下列描述与大量心包积液X线征象不符合的是()
A．心脏普遍增大，心缘各弧消失
B．心脏搏动减弱或消失
C．肺淤血改变
D．卧位透视时见心底阴影增宽
E．心影大小短期内可明显改变
