我国最大的盐场是______；我国最大的渔场是______．
我国最大的盐场为长芦盐场，舟山渔场是我国最大的渔场．
故答案为：长芦盐场；舟山渔场．
----How many times have you been to China?
--- In fact, it is the third time that I __________ here.
A．was
B．am
C．had been
D．have been
关于嗜铬细胞瘤的诊断方法，正确的有（）
A.肿瘤较大但密度均匀
B.CT检查是首选
C.临床符合者，应加扫肾门、腹主动脉旁
D.增强扫描肿瘤不强化
E.必要时可进行肾上腺髓质显像
