（）is a technique used for illumination behind the liquid crystal display that makes LCDs easier to read.

单项选择题（）enables a computer processor to process two sets of instructions at the same time.

A.Multi-tasking
B.Hyper-threading
C.Hyper-caching
D.Caching

单项选择题（）is commonly performed on CPUs and video cards to allow users to get enhanced performance.

A. Hyperthreading
B. Duplexing
C. Caching
D. Overclocking