Austria GP — Sept. 20
第四十九条 纳税人适用退（免）税的出口业务，可以放弃退（免）税，选择免征增值税或者缴纳增值税，自放弃退（免）税之日次月起，适用退（免）税的出口业务免征增值税或者按规定缴纳增值税。
，更多细节参见51吃瓜
Frequently recommended as alternatives。heLLoword翻译官方下载对此有专业解读
Intel documentation describes the 386's Protection Test Unit as a component that "implements fast testing of complex memory protection functions." It is mostly composed of a PLA (Programmable Logic Array), referred to as Test PLA by Intel, that is physically visible by its regular appearance on the die. This single piece of combinational logic replaces what would otherwise be dozens of multi-cycle conditional branches in the microcode. Instead of testing privilege rules sequentially, the microcode issues a single protection test operation, and the PLA evaluates all applicable rules in parallel, producing a complete decision in one evaluation: continue, fault, or redirect to a gate handler.
The bandwidth problem