实现下丘脑与神经垂体之间的功能联系，依靠
A．垂体门脉系统B．下丘脑促垂体区C．下丘脑—垂体束D．正中隆起E．下丘脑调节肽
参考答案：C
They _____ on the program for almost one week before I joined them, and now we _____ it as no good results have come out.
A．had been working; are still working
B．had worked; were still working
C．have been working; have worked
D．have worked; are still working
致畸因子影响面部突起生长与联合，导致面部发育异常的时间是
A．胚胎第3周至第4周B．胚胎第6周至第7周C．胚胎第10周D．胚胎第3个月E．胚胎第6个月
