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手工电弧焊对焊条的工艺性能有哪些要求？

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机械识记和意义识记是儿童识记忆的两种方法。

A. 正确
B. 错误

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盛花花坛的配色不宜过多，一般的花坛配色应为（）。

A. 3—4种
B. 2—3种
C. 1—2种
D. 4—5种

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QUESTION 14 You have a computer that contains a DVD drive and a single 350-GB hard disk drive. You attempt to installWindows 7 on the computer by using the DVD installation media and receive the following error message:Reboot and Select proper Boot device or Insert Boot Media in selected Boot device. You need to ensurethat you can install Windows 7 on the computer by using the DVD installation media. What should you do?（）

A. From the BIOS, modify the startup order.
B. From the BIOS, enable Pre-Boot Execution Environment (PXE).
Create an answer file named oobe.xml and place the file on the hard disk drive.
D. Create an answer file named autounattend.xml and place the file on the hard disk drive.

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产品进罐前必须按工艺规定：《9900-112》和（）打扫和清理真空罐和平车卫生。

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