等差数列{an}中，a2=5，a6=33，则a4=______．

公民道德建设要坚持（）与维护社会公平相协调。

A．注重效率 

B．效率优先 

C．提高效率 

D．降低效率

原发性巨块型肝癌超声表现，不包括（）

A.肝内巨大的实质性肿块，呈分叶状或类圆球状

B.肿块边界清楚，多见丰富血流信号

C.肿块内部回声可呈结节融合状，即块中块表现

D.肿块坏死时，中心可见不规则高回声区

E.肿块向外浸润时，与周围肝组织界线不清

最严重的输血反应是

A．发热反应

B．肺水肿

C．病毒性肝炎

D．溶血反应

E．空气栓塞

A: How did your interview go B: ______

A．A manager interviewed me.

B．I couldn't feel better about it! The questions were very fair, and I seemed to find an answer for all of them.

C．I am fully confident that I answered all the questions to the needs of the interviewer.

D．I answered all the questions of the interviewer to his satisfaction. But he may discriminate against me.

数目最少、体积最大、沿界沟方向排列的是

A．味蕾
B．丝状 * *
C．菌状 * *
D．轮廓 * *
E．叶状 * *