— Do you prefer a portable or a clumsy 3D printer?

—                      .

 I was giving a talk to a large group of people，the same talk I ___to half a dozen other groups before. 

You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

_________ refers to the process of a two dimensional picture by a digital computer.

A rectangular area that can contain a document, program, or message.

We are a large chain of retailers and are looking for a manufacturer ______ could supply us with a large quantity of smart phones for the teenager market.

You have a server that has very limited memory but has a very large table. You will use mysqldump to back up this table.
Which option will ensure mysqldump will process a row at a time instead of buffering a set of rows?（）

Immediately after adding a new disk to or removing an existing disk from an ASM instance, you find that the performance of the database goes down initially until the time the addition or removal process is completed, and then gradually becomes normal.
Which two activities would you perform to maintain a consistent performance of the database while adding or removing disks?（）