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设备安装时，垫铁的放置方法有（）。

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QS1型交流电桥测量时，接好线后首先，接通电源，合上光源开关，用“调零”旋钮，使光带位于中间位置，加试验电压，并将“tanØ”转至“接通”位置。接着增加检流计灵敏度，旋转调谐旋钮，找到谐振点，使光带展至最大宽度，再调节R3使光带缩窄。增加灵敏度按R3、C4、ρ的顺序反复调节，使光带缩至最窄（一般不超过4mm），这时电桥达到平衡。

A. 正确
B. 错误

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某工厂每天要烧掉含硫1.6%的烟煤100T，排放的二氧化硫污染环境，如果变废为宝回收利用，在理论上，每年（360天）可生产98%的硫酸多少吨？

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Your companys security policy requires complex passwords. You have a comma delimited file named import.csv that contains user account information. You need to create user accounts in the domain by using the import.csv file. You also need to ensure that the new user accounts are set to use default passwords and are disabled. What should you do（）

A. Modify the userAccountControl attribute to disabled. Run the csvde i k f import.csv command. Run the DSMOD utility to set default passwords for the user accounts.
B. Modify the userAccountControl attribute to accounts disabled. Run the csvde f import.csv command. Run the DSMOD utility to set default passwords for the user accounts.
C. Modify the userAccountControl attribute to disabled. Run the wscript import.csv command. Run the DSADD utility to set default passwords for the imported user accounts.
D. Modify the userAccountControl attribute to disabled. Run the ldifde i f import.csv command. Run the DSADD utility to set passwords for the imported user accounts.

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