证券投资基金的投资对象为股票、债券和其他证券投资基金。
参考答案：错
My shoes are black. _________? [ ]
A. What colour is yours?
B. What about yours?
C. What about you?
D. What colour are your?
肠套叠可见腹痛，并伴有（）。
A.急性发热
B.黄疸
C.呕吐
D.腹泻
E.血便
