目前认为乳腺癌最有效的检出方法是（）。
A.防癌普查体检
B.红外线
C.B超
D.钼钯摄片
E.核磁共振
参考答案：D
Great changes have taken place in that school. It is no longer _______ it was 20 years ago, _______ it was so poorly equipped.
A．that; which
B．what; when
C．what; which
D．which; that
头先露时，胎头是以哪条最小径线通过产道
A．枕下前囟径B．双颞径C．双顶径D．枕额径E．枕颏径
