电话机根据送给外线路的不同信号，可分为脉冲式、双音频式和（）式按键电话机。
A. 单音单频
B. 双音单频
C. 单音双频
D. 脉冲/双音频
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审计人员对X公司2007年度财务报表审计时发现，X公司当年发生大额非货币性交易，应提请被审计单位在财务报表附注中披露（）。
A. 非货币性交易和货币性交易的划分原则
B. 非货币性交易的类型
C. 非货币性交易定价基础
D. 非货币性交易实现的损益
E. 非货币性交易的金额
When installing the CRS software on two or more nodes in the same cluster, how do you know it is safe to start installing the next node? （）
A. Wait until the node is completely installed to start installation on the next one.
B. After you insert Disk 2.
C. A dialog box, "It is now safe to start installing the next node," appears during the installation.
D. After Windows OS is installed on the first node.
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