诊断早孕最简单而准确的方法是
A．妊娠试验B．B超检查C．超声多普勒检查D．黄体酮试验E．宫颈黏液检查
参考答案：A
The lake is not near, so there's ______ people going swimming there. [ ]
A. a few
B. few
C. a little
D. little
以下为色素沉着于角膜内皮层的是（）
A.Krukenberg梭形色素沉着
B.Fleischer环
C.Kayser-Fleischer环
D.Stocker线
E.Ferry线
