为客人开红葡萄酒时,怎么办?
分别简述利润、营业利润和利润总额的含义。
从权力的性质上,一般把行政领导权力分为() ["决策权力","权力性影响力","合法权力","奖惩权力","非权力性影响力"]
按GB7588-2003《电梯制造与安装安全规范》规定,曳引轮的节圆直径与悬挂绳的公称直径之比应不小于()。 ["30","40","50"]
Which of the following local files is used to run the date command on the remote machine "Earth" using the following rexec command without request for a password? rexec Earth date()。 ["~\/ .rhosts","$HOME\/.netrc","\/etc\/hosts.equiv","\/etc\/security\/user"]
确立产品和服务主要包括哪些内容和要素?