如某投资组合由收益呈完全负相关的两只股票构成，当该组合的标椎差为零时，组合的风险被全部消除。 ()
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A．Future happiness is attractive,B．The man shouldn't work too hard for the happiness o
A. Future happiness is attractive,
B. The man shouldn't work too hard for the happiness of future.
C. The man should retire early.
D. Today's happiness is less important than tomorrow's.
内部审计和注册会计师审计的时间不同，其中内部审计通常采用定期审计的方式，注册会计师审计采用受托审计，时间安排比较灵活。()
A. 正确
B. 错误
There are 2 switches in the Ezonexam LAN, with no routers. Ports 1, 2 & 3 are assigned
A. Host 1 on VLAN 1 can ping Host 2 on VLAN 1
B. Host 1 on VLAN 1 can ping Host 4 on VLAN 2
C. Host 1 on VLAN 1 can not ping Host 2 on VLAN 1
D. Host 4 on VLAN 2 can not ping Host 1 on VLAN 1
E. Host 4 on VLAN 2 can ping Host 2 on VLAN 2
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