组建证券投资组合时，多元化策略是指依据一定的现实条件，组建一个在一定收益条件下风险最小的投资组合
参考答案：对
_____ makes his parents proud is _____ his son has been admitted by Beijing University.
A．That; because
B．That; what
C．What; that
D．What; because
正常血浆中的血红蛋白低于50 mg/L，而且与触珠蛋白形成大分子化合物，不能从肾小球通过。（）
