标定可燃气体探测器的标气浓度必须大于20%LEL,一般情况下为()LEL.
A. 20%
B. 30%
C. 50%
D. 100%
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HART协议采用基于Bell202标准的FSK频移键控信号,在低频的4~20mA信号上叠加幅度为0.5mA的音频数字信号进行双向数字通讯,数据传输率为()
A. 100mbps
B. 200mbps
C. 500mbps
D. 1.2M
Your company has an Active Directory Domain Services (AD DS) domain. You have a main office and a branch office that are connected by a slow WAN link. All servers are located in the main office. You virtualize an application by using Microsoft Application Virtualization (App-V) 4.5. The available bandwidth is not sufficient for branch office users to run the virtualized application. You need to ensure that branch office users can run the virtualized application by using the Microsoft Application Virtualization Desktop Client. What should you do?()
A. On each App-V server in the main office, upgrade the App-V desktop clients to 4.6.
B. On each client computer in the branch office, upgrade the App-V desktop clients to 4.6.
C. On each client computer in the branch office, install the application by using Windows Installer (.msi) files created by the App-V Sequencer.
D. In the Microsoft System Center Application Virtualization Management Server, configure an Application Virtualization file server for the main office.
(),税务机关可以对其核定应纳税额。
A. 下岗工人张某开了一间小饭馆
B. 甲公司开业两个月仍未设账
C. 乙公司经税务机关多次催促,仍未进行纳税申报
D. 农民老张农闲时将自己加工的家具拿到市场上销售