投资收益是对承担风险的补偿。（）
参考答案：对
解析：熟悉证券组合管理的意义、特点、基本步骤。
— sports right after meals good for us.
—You’re right.[ ]
A. Playing, is
B. Play, is
C. Playing, are
D. Play, are
车削M36×2的内螺纹，工件材料为45钢，则车削内螺纹前的孔径尺寸为（）mm。
A．34
B．33.9
C．33.835
D．36
