近年来神经生理学研究发现痛觉的重要脑中枢位于间脑中的（）.
A.中线核
B.内侧核
C.外侧核
D.板内核
参考答案：D
—The Summer Palace is wonderful. Have you ever visited any other interesting places?
—Yes. Also, we _______ to the Great Wall. [ ]
A. have gone
B. have been
C. had gone
D. had been
下列投资基金的类型中，（）通过发行受益凭证，向投资大众募集资金。
A.契约型基金
B.公司型基金
C.开放型基金
D.封闭型基金
