正后壁心肌梗死出现特征性心电图改变的导联是（）  A.V1～V3 B.Ⅱ、Ⅲ、aVF

如果A×8=B×5（A，B不等于0），那么A：B=______：______．

An unhappy childhood may have some negative effects on a person’s characters however, they are not always_________,

A．practical

B．avoidable

C．permanent

D．beneficial

To keep certain information private and secure while providing remote access for employees, many businesses are creating intranets. An intranet is an (71) organizational internet that is guarded against outside access by a special (72) feature called a firewall (which can be software, hardware, or a combination of the two).

A．interconnection

B．security

C．isolation

D．access

根据《国务院关于投资体制改革的决定》的规定，对于采用直接投资和资本金注入方式的政府投资项目，政府需要从投资决策的角度审批其( )。

A．项目建议书和可行性研究报告
B．开工报告和初步设计概算
C．资金申请报告和项目建议书
D．可行性研究报告和资金申请报告