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7.[基础理论知识]什么是焊接电弧，通常的引弧方法有那二种？

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卷烟零售客户按业态划分为哪几类？

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从效应发生到熄灭的时间称为效应持续时间。

A. 正确
B. 错误

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小企业出售原作为固定资产管理的不动产应缴纳的营业税，应借记（）等科目，贷记“应交税费——应交营业税”科目

A. 固定资产清理
B. 营业外支出
C. 其他业务成本
D. 固定资产

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A user reports that he is unable to start his computer. He provides the following information:.The boot partition is encrypted by using BitLocker Drive Encryption (BitLocker). The user cannot locate his BitLockerrecovery key. You need to start Windows 7 on the computer. The solution must use the minimum amount ofadministrative effort. What should you do?（）

A. From the BIOS, disable the Trusted Platform Module (TPM).
B. Start the computer from the Windows 7 installation media and select Install now.
C. Start the computer from the Windows 7 installation media and select Repair your computer.
D. Start the computer from the Windows 7 installation media, press SHIFT+F10, and then run CHKDS

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