现金收入管理的基本规定要求收费结算员在收入现金时，应（）。
A. 先开收据再收款
B. 不用开收据
C. 先收款再写欠条
D. 先收款后开收据
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对威廉・夏普资本资产定价模型（CAPM）的检验性提出质疑的是（）。
A. 法玛
B. 马柯威茨
C. 詹森
D. 罗斯
高校职业道德规定了教师处理个人利益与集体利益、（）的道德原则。
A. 社会利益
B. 国家利益
C. 家庭利益
D. 学校利益
Which three of these statements about PPPoE are true？（）
A. PPPoE can provide a host with access to a destination over Ethernet. You can have only one PPPoE session per PVC
B. You must install PPPoE client software on all hosts that connect to the Ethernet segment. This means that the access provider must maintain a CPE
C. You cannot use PPPoE with Cisco Service Selection Gateway
D. PPPoE implementation is susceptible to broadcast storms and possible denial-of-service attacks
E. Per-session accounting is possible， which allows the service provider to charge the subscriber based on session time for various services offered. The service provider can also require a minimum access charge
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